CONTINGENT VALUE RIGHTS AGREEMENT

Exhibit 2.2

This CONTINGENT VALUE RIGHTS AGREEMENT, dated as of , 200 (this “Agreement”), is entered into by and among MEDICAL DEVICE ALLIANCE INC., a Nevada corporation (the “Company”), ARTHROCARE CORPORATION, a Delaware corporation (“Parent”), ALPHA MERGER SUB CORPORATION, a Nevada corporation (“Merger Sub”), (the “Rights Agent”) and Xxxxx Xxxxxxxx (the “Stockholders’ Agent”).

RECITALS

WHEREAS, the Company, Parent and Merger Sub have entered into an Agreement and Plan of Merger dated as of October 23, 2003 (the “Merger Agreement”), pursuant to which at the Effective Time, Merger Sub will be merged with and into the Company, with the Company continuing as the Surviving Corporation;

WHEREAS, upon consummation of the Merger, the Company will become a wholly-owned subsidiary of Parent;

WHEREAS, the consideration that shall be paid by Parent pursuant to the Merger Agreement includes contingent value rights as hereinafter described; and

WHEREAS, all things necessary have been done to make the contingent value rights, when issued pursuant to the Merger Agreement and hereunder, the valid obligations of Parent, and to make this Agreement a valid agreement of Parent, in accordance with its terms, and to ensure that payment in the form of such contingent value rights will not require registration under the Securities Act.

NOW, THEREFORE, for and in consideration of the premises and the consummation of the transactions referred to above, it is mutually covenanted and agreed as follows:

ARTICLE I.

DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

Section 1.1 Definitions.

(a) For all purposes of this Agreement, except as otherwise expressly provided or unless the context otherwise requires:

(i) the terms defined in this Article have the meanings assigned to them in this Article, and include the plural as well as the singular;

(ii) all accounting terms used herein and not expressly defined shall have the meanings assigned to such terms in accordance with generally accepted accounting principles, and the term “generally accepted accounting principles” means such accounting principles as are generally accepted in the United States at the time of any computation;

(iii) the words “herein,” “hereof” and “hereunder” and other words of similar import refer to this Agreement as a whole and not to any particular Article, Section or other subdivision; and

(iv) unless the context otherwise requires, words describing the singular number shall include the plural and vice versa, words denoting any gender shall include all genders and words denoting natural Persons shall include corporations, partnerships and other Persons and vice versa.

(b) Capitalized terms used herein and not otherwise defined shall have the meanings ascribed to them in the Merger Agreement. The following additional terms shall have the meanings ascribed to them as follows:

“Act,” when used with respect to any Holder, has the meaning specified in Section 1.2.

“Aggregate Earnout Payment Amount” shall mean (A) 2.75 times the Net Revenue recognized by the Company during the Earnout Period, minus (B) the Initial Consideration (as defined in the Merger Agreement) paid in connection with the Merger, minus (C) the Working Capital Holdback Amount, minus (D) the California Holdback Amount. In the event that the Aggregate Earnout Payment Amount is a negative number, then the Aggregate Earnout Payment Amount shall be equal to zero. For purposes of clarity, if no Net Revenue is recognized during the Earnout Period, the Aggregate Earnout Payment Amount shall be equal to zero.

“Aggregate Shared Earnout Payment Amount” means (i) the Aggregate Earnout Payment Amount, minus (ii)(A) the Common Stock Earnout Payment Amount, multiplied by (B) the total number of Common Stock CVRs outstanding on any CVR Payment Date.

“Affiliate” of a Person means a Person that, directly or indirectly, through one or more intermediaries, controls, is controlled by, or is under common control with, the first mentioned Person.

“Base Working Capital Amount” shall have the meaning set forth in Section 5.12 of the Merger Agreement.

“Board of Directors” means the board of directors of Parent.

“Board Resolution” means a copy of a resolution certified by the secretary or an assistant secretary of Parent to have been duly adopted by the Board of Directors and to be in full force and effect on the date of such certification, and delivered to the Rights Agent.

“Business” shall mean the Company’s existing percutaneous cement injection and vertebroplasty related products (including biopsy products) and the percutaneous cement injection and vertebroplasty related products in the Company’s development process as of the date hereof (i.e. new needle configurations, mixing apparatus, new injection systems, potential new configurations and indications of polymethyl methacryate cement (“PMMA”), new tracer particles and new technology for bone navigation including the bone catheter), as well as any

products that are covered by claims in the Company’s current patents or patent applications or any licenses or sales of products to third parties derived from the Company’s patents or patent applications as of the Effective Time or any continuations or divisionals that derive from such patents or patent applications. For purposes of clarity, specifically excluded from the definition of Business shall be bone cement other than PMMA to the extent it would not be covered by a patent or patent application held by the Company as of the Effective Time and any products derived from Parent’s coblation product line or products developed or acquired after the date hereof by Parent or any of its Affiliates.

“Business Day” means any day other than a Saturday, Sunday or a day on which banking institutions in New York, New York are authorized or obligated by law or executive order to remain closed.

“California Holdback Amount” means $1.8 million, minus the amount that, prior to the Effective Time, the Company shall have paid to the California Franchise Tax Board with respect to the liability owed to the State of California as set forth on the 2002 California tax return referred to in Section 5.14 of the Merger Agreement.

“California Holdback Payment Amount” means the California Holdback Amount minus any Franchise Taxes owed or owing to the State of California with respect to the taxable year 2002, as finally determined by any examination, audit or other proceeding made by any taxing authority, divided by the total number of Common Stock CVRs outstanding on such CVR Payment Date.

“Cash/Holdback Payment Amount” means the Estimated Cash Amount minus the Estimated MDA Liabilities, plus the Working Capital Holdback Amount, divided by the total number of Common Stock CVRs outstanding on such CVR Payment Date.

“Cash Equivalents” means (i) securities issued or directly and fully guaranteed or insured by the United States government or any agency or instrumentality thereof having maturities of not more than six months from the date of acquisition, (ii) certificates of deposit with maturities of six months or less from the date of acquisition, bankers’ acceptances with maturities not exceeding six months and overnight bank deposits, in each case with any commercial bank organized and in existence under the laws of the United States and having capital and surplus in excess of $500 million, (iii) repurchase obligations with a term of not more than seven days for underlying securities of the types described in clauses (i) and (ii) above entered into with any financial institution meeting the qualifications specified in clause (ii) above, (iv) commercial paper having the highest rating obtainable from Xxxxx’x Investors Service, Inc. or Standard & Poor’s Ratings Services and in each case maturing within 180 days after the date of acquisition, (v) investments in commercial paper, maturing not more than 180 days after the date of acquisition, issued by a corporation organized and in existence under the laws of the United States or any foreign country recognized by the United States with a rating at the time as of which any investment therein is made of “P-1” (or higher) according to Xxxxx’x Investor Service, Inc. or “A-1” (or higher) according to Standard & Poor’s Ratings Services, and (vi) money market mutual funds substantially all of the assets of which are of the type described in the foregoing clauses (i) through (v) above.

“Closing Balance Sheets” means the unconsolidated unaudited balance sheets of the Company and Parallax as of the Closing Date prepared in accordance with GAAP consistently applied in the preparation of the Audited Balance Sheets (as defined in the Merger Agreement).

“Closing Balance Sheet Payment Amount” means for each Common Stock CVR on any CVR Payment Date, (i)(A) the Closing Cash Amount, minus (B) the Working Capital Shortfall, minus (C) the MDA Liabilities plus (D) the Working Capital Holdback Amount, divided by (ii) the total number of Common Stock CVRs outstanding on such CVR Payment Date, provided that if the Closing Balance Sheet Payment Amount is zero or a negative number, then no payment shall be made, and Parent shall be entitled to offset any negative Closing Balance Sheet Payment Amount against any Earnout Payment Amount required to be made under Section 2.4(c).

“Closing Cash Amount” means, as of the Closing Date, (i) the cash and Cash Equivalents of the Company (on an unconsolidated basis), less (ii) all liabilities or obligations of the Company on an unconsolidated basis relating to any financial advisor, legal, accounting, and any other transaction fees, as well as any other liabilities or obligations (including, without limitation, golden parachute payments and severance payments) that arise out of or result from the transactions contemplated by this Agreement or the Merger Agreement (but not paid in cash prior to the Closing Date), less (iii) all accrued dividends owed to the holders of the Company Series B Preferred Stock on or prior to the Closing Date (but not paid in cash prior to the Closing Date) (in each case, ignoring all intercompany accounts). The Closing Cash Amount may be a negative number.

“Code” means the Internal Revenue Code of 1986, as amended.

“Commission” means the Securities and Exchange Commission of the United States of America.

“Common Stock CVRs” shall mean the contingent value rights issued pursuant to Sections 2.1.1.1 and 2.5 of the Merger Agreement.

“Common Stock Earnout Payment Amount” means the Aggregate Earnout Payment Amount divided by the total number of Common Stock CVRs outstanding on such CVR Payment Date; provided, however, in the event that the sum of (i) the Common Stock Earnout Payment Amount, plus (ii) the Initial Common Consideration (as defined in the Merger Agreement), plus (iii) the Cash/Holdback Payment Amount or the Closing Balance Sheet Payment Amount (whichever is paid under Section 2.4(a) or (b)), is greater than $7.50, then the Common Stock Earnout Payment Amount shall be equal to (i) $7.50, minus (ii) the Initial Common Consideration, and minus (iii) the Cash/Holdback Payment Amount or the Closing Balance Sheet Payment Amount (whichever is paid under Section 2.4(a) or (b)).

“control” (including the terms “controlled”, “controlled by” and “under common control with”) means the possession, directly or indirectly or as trustee or executor, of the power to direct or cause the direction of the management or policies of a Person, whether through the

ownership of stock, including the power to dispose of or vote such stock, as trustee or executor, by contract or otherwise.

“CVR Payment Amount” means, collectively, the Cash/Holdback Payment Amount or the Closing Balance Sheet Payment Amount (whichever is paid under Section 2.4(a) or (b)), the Earnout Payment Amount, and the California Holdback Payment Amount.

“CVR Payment Date” means any date that any CVR Payment Amount is paid by Parent to the Holders, which shall be established pursuant to Section 2.5(a).

“CVR Register” and “CVR Registrar” have the respective meanings specified in Section 2.3(b).

“CVRs” means the Common Stock CVRs and Preferred Stock CVRs to be issued by Parent pursuant to the Merger Agreement.

“Earnout Payment Amount” for each Common Stock CVR on any CVR Payment Date means the Common Stock Earnout Payment Amount and the Shared Earnout Payment Amount, and for each Preferred Stock CVR on any CVR Payment Date means the Shared Earnout Payment Amount.

“Earnout Period” shall mean January 1, 2005 through December 31, 2005.

“Estimated Cash Amount” shall have the meaning set forth in Section 5.12 of the Merger Agreement.

“Holder” means a Person in whose name a CVR is registered in the CVR Register.

“MDA Liabilities” means, on an unconsolidated basis, the liabilities and obligations of the Company of any nature (whether accrued, absolute, contingent or otherwise) (ignoring all intercompany accounts) (including as liabilities of the Company all estimated amounts relating to any financial advisor, legal, accounting, and any other transaction fees, as well as any other liabilities or obligations (including, without limitation, parachute payments and severance payments) that arise out of or result from the transactions contemplated by this Agreement (but not paid in cash prior to the Effective Time), plus all accrued dividends owed to the holders of the Company Series B Preferred Stock on or prior to the Closing Date (but not paid in cash prior to the Closing Date) (in each case, ignoring all intercompany accounts).

“Merger Agreement” has the meaning set forth in the recitals to this Agreement.

“Net Revenue” shall mean all revenue earned by the Company in the operation of the Business during the Earnout Period, less, to the extent included in such revenue, the total of: (i) ordinary and customary trade, quantity or cash discounts actually allowed; (ii) credits, rebates and returns (including, but not limited to, wholesaler and retailer returns); (iii) freight, postage, insurance, transportation and duties paid for and separately identified on the invoice or other documentation maintained in the ordinary course of business; and (iv) sales, use, tariff and other excise taxes, other consumption taxes, customs duties and compulsory payments to

governmental authorities actually paid and separately identified on the invoice or other documentation maintained in the ordinary course of business. Net Revenue shal be determined in accordance with the Company books and records in respect of such Business in accordance with GAAP.

“Officer’s Certificate” means a certificate signed by the chairman of the Board of Directors or the president, any vice president, the controller, the treasurer, the secretary or any assistant secretary, in each case of Parent, in his or her capacity as such an officer, and delivered to the Rights Agent.

“Opinion of Counsel” means a written opinion of counsel, who shall be selected by the Rights Agent.

“Parallax” means Parallax Medical, Inc., a Delaware corporation.

“Parent” has the meaning set forth in the first paragraph of this Agreement.

“Person” means any individual, corporation, partnership, joint venture, limited liability Parent, business trust, association, joint-stock company, trust, estate, unincorporated organization or government or any agency or political subdivision thereof.

“Preferred Stock CVRs” shall mean the contingent value rights issued pursuant to Sections 2.1.1.2 of the Merger Agreement.

“Rights Agent” has the meaning set forth in the first paragraph of this Agreement, until a successor Rights Agent shall have become such pursuant to the applicable provisions of this Agreement, at which time “Rights Agent” shall mean such successor Rights Agent.

“Shared Earnout Payment Amount” means the Aggregate Shared Earnout Payment Amount divided by the total number of Common Stock CVRs and Preferred Stock CVRs on such CVR Payment Date.

“Stockholders’ Agent” has the meaning set forth in the first paragraph of this Agreement, until a successor Stockholders’ Agent shall have become such pursuant to the applicable provisions of this Agreement, at which time “Stockholders’ Agent” shall mean such successor Stockholders’ Agent.

“Subsidiary” when used with respect to any Person means any corporation or other organization, whether incorporated or unincorporated, of which such Person directly or indirectly owns or controls at least a majority of the securities or other interests having by their terms ordinary voting power to elect a majority of the board of directors or others performing similar functions with respect to such corporation or other organization, or any organization of which such Person is a general partner.

“Surviving Person” has the meaning set forth in Section 7.1(a)(1).

“Working Capital Amount” means (i) all unconsolidated current assets of the Parallax, minus (ii) all unconsolidated current liabilities of Parallax, each as calculated in

accordance with GAAP consistently applied with the Audited Balance Sheet, provided, however, that all unconsolidated liabilities or obligations of Parallax relating to any financial advisor, legal, accounting, and any other transaction fees, as well as any other liabilities or obligations (including, without limitation, parachute payments and severance payments) that arise out of or result from the transactions contemplated by this Agreement or the Merger Agreement (but not paid in cash prior to the Closing Date) shall be included as current liabilities of Parallax.

“Working Capital Holdback Amount” means $2.0 million.

“Working Capital Shortfall” means, in the event that the Working Capital Amount as of the Closing Date is less than 80% of the Base Working Capital Amount, (i) (A) the Base Working Capital Amount, multiplied by (B) 0.80, minus (ii) the Working Capital Amount. In the event that the Working Capital Amount is equal to or more than 80% of the Base Working Capital Amount, then the Working Capital Shortfall shall be equal to zero.

The following additional terms have the meanings ascribed to them in the sections indicated:

Term

Section

Balance Sheet Independent Accountant

Balance Sheet Report

Change of Control

Claim Notice

Covered Parties

Damages

Dispute Notice

Earnout Dispute Notice

Earnout Report

Independent Accountant

Offset Dispute Notice

2.4(b)(iii)

2.4(b)(i)

2.4(c)(v)

2.4(d)(iv)

2.4(d)(ii)

2.4(b)(iii)

2.4(c)(iii)

2.4(c)(i)

2.4(c)(iii)

2.4(d)(v)

Section 1.2 Acts of Holders.

(a) Any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Agreement to be given or taken by Holders may be embodied in and evidenced by one or more instruments of substantially similar tenor signed by such Holders in person or by agent duly appointed in writing; and, except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments, executed by the requisite percentage of the Holders in accordance with this Agreement, are delivered to the Rights Agent and, where it is hereby expressly required, to Parent. Such instrument or instruments (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the “Act” of the Holders signing such instrument or instruments. Unless otherwise expressly provided to the contrary herein, the Act of the Holders of a majority of the outstanding CVRs shall constitute the Act of the Holders.

(b) The fact and date of the execution by any Person of any such instrument or writing may be proved in any reasonable manner that the Rights Agent deems sufficient.

Section 1.3 Notices to Rights Agent and Parent. Any request, demand, authorization, direction, notice, consent, waiver or Act of Holders or other document provided or permitted by this Agreement to be made upon, given or furnished to, or filed with:

(a) the Rights Agent by any Holder or Parent shall be sufficient for every purpose hereunder if in writing and delivered personally, or mailed first-class postage prepaid or sent by a nationally recognized overnight courier to the Rights Agent addressed to it at , or at any other address previously furnished in writing to the Holders and Parent by the Rights Agent; or

(b) Parent by the Rights Agent or by any Holder shall be sufficient for every purpose hereunder if in writing and delivered personally, telecopied or mailed first-class postage prepaid or sent by a nationally recognized overnight courier to Parent addressed to it at , or at any other address previously furnished in writing to the Rights Agent and the Holders by Parent.

Section 1.4 Notice to Holders. Where this Agreement provides for notice to Holders, such notice shall be sufficiently given (unless otherwise herein expressly provided) if in writing and mailed, first-class postage prepaid, to each Holder affected by such event, at his, her or its address as it appears in the CVR Register, not later than the latest date, and not earlier than the earliest date, prescribed for the giving of such notice. In any case where notice to Holders is given by mail, neither the failure to mail such notice, nor any defect in any notice so mailed, to any particular Holder shall affect the sufficiency of such notice with respect to other Holders.

Section 1.5 Effect of Headings. The Article and Section headings herein are for convenience only and shall not affect the construction hereof.

Section 1.6 Successors and Assigns. All covenants and agreements in this Agreement by Parent shall bind its successors and assigns, whether so expressed or not.

Section 1.7 Benefits of Agreement. Nothing in this Agreement, express or implied, shall give to any Person (other than the parties hereto, the Holders and their successors and permitted assigns hereunder) any benefit or any legal or equitable right, remedy or claim under this Agreement or under any covenant or provision herein contained, all such covenants and provisions being for the sole benefit of the parties hereto, the Holders and their successors and permitted assigns.

Section 1.8 Governing Law. This Agreement and the CVRs shall be governed by and construed in accordance with the laws of the State of , without regard to any principles of conflicts of laws.

Section 1.9 Legal Holidays. In the event that a CVR Payment Date shall not be a Business Day, then (notwithstanding any provision of this Agreement to the contrary) any

payment required to be made in respect of the CVRs on such date need not be made on such date, but may be made on the next succeeding Business Day with the same force and effect as if made on the applicable CVR Payment Date.

Section 1.10 Severability Clause. In case any one or more of the provisions contained in this Agreement shall for any reason be held to be invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect any other provisions of this Agreement, but this Agreement shall be construed as if such invalid or illegal or unenforceable provision had never been contained herein. Upon such determination that any term or other provision is invalid, illegal or unenforceable, the court or other tribunal making such determination is authorized and instructed to modify this Agreement so as to effect the original intent of the parties as closely as possible so that the transactions and agreements contemplated herein are consummated as originally contemplated to the fullest extent possible.

Section 1.11 Counterparts. This Agreement may be signed in any number of counterparts, each of which shall be deemed to constitute but one and the same instrument.

Section 1.12 Effectiveness. This Agreement shall be effective from and after the Effective Time of the Merger. This Agreement shall be deemed terminated and of no force or effect, and the parties hereto shall have no liability hereunder, if the Merger Agreement is terminated in accordance with its terms.

Section 1.13 Entire Agreement. This Agreement and the Merger Agreement represent the entire understanding of the parties hereto with reference to the transactions and matters contemplated hereby and thereby and this Agreement supersedes any and all other oral or written agreements hereto made except for the Merger Agreement. If and to the extent that any provision of this Agreement is inconsistent or conflicts with the Merger Agreement, this Agreement shall govern and be controlling.

ARTICLE II.

CONTINGENT VALUE RIGHTS

Section 2.1 Issuance of CVRs. The CVRs shall be issued as a portion of the Merger Consideration at the times and in the manner set forth in the Merger Agreement.

Section 2.2 Nontransferable. The CVRs shall not be assignable or otherwise transferable by Holders, except by will, upon death or by operation of law.

Section 2.3 No Certificate; Registration; Registration of Transfer; Change of Address.

(a) The CVRs shall not be evidenced by a certificate or other instrument.

(b) Parent shall cause to be kept at Parent’s principal office a register (the register maintained in such office and in any other office designated pursuant to this Section 2.3 being herein sometimes referred to as the “CVR Register”) in which Parent shall provide for the registration of CVRs. The Secretary of Parent is hereby initially appointed “CVR Registrar” for the purpose of registering CVRs and transfers of CVRs as herein provided.

(c) Subject to the restriction on transferability set forth in Section 2.2, every request made to Parent to transfer a CVR must be in writing and accompanied by a written instrument of transfer in form reasonably satisfactory to Parent and the CVR Registrar, duly executed by the Holder thereof, his attorney duly authorized in writing, personal representative or survivor and setting forth in reasonable detail the circumstances relating to the transfer. Upon receipt of such written notice by Parent, the CVR Registrar shall, subject to his reasonable determination that the transfer instrument is in proper form and the transfer otherwise complies with the other terms and conditions herein, register the transfer of the CVRs in the CVR Register. All transfers of CVRs registered in the CVR Register shall be the valid obligations of Parent, evidencing the same right, and shall entitle the transferee to the same benefits and rights under this Agreement, as those held by the transferor. No transfer of a CVR shall be valid until registered in the CVR Register and any transfer not duly registered in the CVR Register will be void ab initio.

(d) A Holder may make a written request to the CVR Registrar or Parent to change such Holder’s address of record in the CVR Register. The written request must be duly executed by the Holder. Upon receipt of such written notice by the CVR Registrar or Parent, the CVR Registrar shall promptly record the change of address in the CVR Register.

Section 2.4 Payment Procedures.

(a) Cash/Holdback Payment. As promptly as practicable after the Closing, but in no event later than 15 days following the Closing, Parent shall review the Estimated Cash Amount, the Estimated Working Capital Amount, and the Estimated MDA Liabilities provided to Parent by the Company prior to the Effective Time of the Merger under Section 5.12 of the Merger Agreement. In addition, Parent shall review the books and records of the Company as of the Closing Date. In the event that Parent shall have any grounds to believe, in its sole and absolute discretion, that one or more of the following facts may be true, Parent shall have no further obligation under this Section 2.4(a) and Parent shall proceed to Section 2.4(b):

(i) the Closing Cash Amount is less than the Estimated Cash Amount,

(ii) the Working Capital Amount as of the Closing Date is less than 80% of the Base Working Capital Amount, or

(iii) the MDA Liabilities as of the Closing Date are greater than the Estimated MDA Liabilities.

In the event that Parent shall have no grounds to believe, in its sole and absolute discretion, that any of the foregoing facts are not true and accurate in all respects, then Parent shall pay or cause to be paid as promptly as practicable the Cash/Holdback Payment Amount. In the event that, thereafter, Parent shall determine through the procedures set forth in Section 2.4(b) that any of the foregoing facts are not true and accurate in all respects, then Parent shall be entitled to offset the amount of any final discrepancy against any Earnout Payment Amount required to be made under Section 2.4(c).

(b) Closing Balance Sheet Payment.

(i) As promptly as practicable after the Closing, but in no event later than 45 days following the Closing, Parent shall provide the Stockholders’ Agent a Closing Balance Sheet, together with schedules calculating the Closing Cash Amount, the Working Capital Amount and the MDA Liabilities as of the Closing Date (the “Balance Sheet Report”). If a Dispute Notice (as defined below) is not delivered pursuant to Section 2.4(b)(iii) below, then in no event later than 60 days following the Closing, Parent shall pay or cause to be paid the Closing Balance Sheet Payment Amount, provided, however, that if the Parent has previously paid or cause to be paid the Cash/Holdback Payment Amount pursuant to Section 2.4(a), then Parent shall not be obligated to pay the Closing Balance Sheet Payment Amount.

(ii) Parent shall keep full, clear and accurate books and records with respect to the Business. The books and records shall be maintained in such a manner that the Closing Cash Amount, the Working Capital Amount and the MDA Liabilities shall be readily verifiable and shall be available for inspection by the Stockholders’ Agent, all upon reasonable prior notice and during normal business hours. The information contained in the books and records of Parent with respect to the Business shall remain confidential. If the Stockholders’ Agent does not deliver to Parent a Dispute Notice (as defined below) as set forth in Section 2.4(b)(iii) below, then the Balance Sheet Report shall be deemed final and binding and neither the Stockholders’ Agent nor the Holders shall have any further right to contest the report, the computation of the Closing Cash Amount, the Working Capital Amount or the MDA Liabilities.

(iii) In the event that the Stockholders’ Agent shall dispute the information set forth by Parent in the Balance Sheet Report, then, within 30 calendar days following the date of the delivery by Parent of such report, the Stockholders’ Agent shall provide written notice to Parent (the “Dispute Notice”) specifying the amount disputed and the basis for the dispute, together with supporting documentation reflecting the analysis of and justification for any recomputation made. Parent and the Stockholders’ Agent shall make good faith efforts to resolve the dispute through negotiations for a period of 30 calendar days following the receipt of the written notice defining and describing the nature of the dispute. In the event that the parties are unable to finally resolve the dispute within such 30 calendar-day period, the parties to the dispute may elect by mutual agreement to extend the period of negotiation and may elect by mutual agreement to engage a mediator to assist in such negotiation. To the extent that any matter remains unresolved following negotiations, the Stockholders’ Agent and Parent shall jointly select an independent accountant of recognized national standing to resolve any remaining disagreements, which independent accountant shall not have provided services to the Stockholder’ Agent, the Company or Parent during the five-year period preceding the date of its selection (the “Balance Sheet Independent Accountant”). The Stockholders’ Agent and Parent shall use their respective commercially reasonable efforts to cause such Balance Sheet

Independent Accountant to make its determination within 30 calendar days of accepting its selection. Within 10 business days after the date of determination of such Balance Sheet Independent Accountant, Parent shall pay or cause to be paid to the Holders the Closing Balance Sheet Payment Amount, if any, in the manner set forth herein, provided, however, that if Parent has previously paid or cause to be paid the Cash/Holdback Payment Amount pursuant to Section 2.4(a), then Parent shall not be obligated to pay the Closing Balance Sheet Payment Amount.

(iv) The decision of the Balance Sheet Independent Accountant shall be a final, binding and conclusive resolution of the parties’ dispute, shall be non-appealable, and shall not be subject to further review. If the Balance Sheet Independent Accountant’s decision indicates that the Holders are not entitled to the disputed portion of the Closing Balance Sheet Payment Amount or the Cash/Holdback Payment Amount, as the case may be, then all reasonable costs and expenses incurred by Parent in connection with the dispute, including all costs and expenses of the Balance Sheet Independent Accountant, shall be deducted by Parent from the Closing Balance Sheet Payment Amount (or, in the event that Parent has previously paid or caused to be paid the Cash/Holdback Payment Amount pursuant to Section 2.4(a), then Parent shall be entitled to offset such expenses against any Earnout Payment Amount required to be made under Section 2.4(c)). If the Balance Sheet Independent Accountant’s decision indicates that the Holders are entitled to the disputed portion of the Closing Balance Sheet Payment Amount or the Cash/Holdback Payment Amount, as the case may be, then Parent shall be responsible for payment of all reasonable costs and expenses incurred by the Stockholders’ Agent in connection with the dispute, including all costs and expenses of the Balance Sheet Independent Accountant.

(i) As promptly as practicable after the end of the Earnout Period, but in no event later than 60 days following December 31, 2005, Parent shall provide the Stockholders’ Agent a report, setting forth the Net Revenues for the 12-month period ended December 31, 2005 (the “Earnout Report”). If an Earnout Dispute Notice is not delivered pursuant to Section 2.4(c)(iii) below, then in no event later than 105 days following December 31, 2005, Parent shall pay or cause to be paid the Earnout Payment Amount in accordance with the terms of this Agreement, subject to the right of offset provisions of Sections 2.4(a), (b) and (d).

(ii) Parent shall keep full, clear and accurate books and records with respect to the Business. The books and records shall be maintained in such a manner that Net Revenue shall be readily verifiable and shall be available for inspection by the Stockholders’ Agent, all upon reasonable prior notice and during normal business hours. The information contained in the books and records of Parent with respect to the Business shall remain confidential. Notwithstanding the foregoing, upon written request of the Stockholders’ Agent, Parent shall provide the Stockholders’ Agent with a report reflecting the estimate of the Net Revenue to date (which estimate is subject to change in the preparation

of the Earnout Report) as promptly as practicable thereafter; provided that the Stockholders’ Agent may only make such a request once every six months commencing on July 1, 2005. If the Stockholders’ Agent does not deliver to Parent an Earnout Dispute Notice (as defined below) as set forth in Section 2.4(c)(iii) below, then the Earnout Report for the Earnout Period shall be deemed final and binding and neither the Stockholders’ Agent nor the Holders shall have any further right to contest the report, the computation of Net Revenue or payment of the Earnout Payment Amount.

(iii) In the event that the Stockholders’ Agent shall dispute the information set forth by Parent in the Earnout Report, then, within 30 calendar days following the date of the delivery by Parent of such report, the Stockholders’ Agent shall provide written notice to Parent (the “Earnout Dispute Notice”) specifying the amount disputed and the basis for the dispute, together with supporting documentation reflecting the analysis of and justification for any recomputation made. Parent and the Stockholders’ Agent shall make good faith efforts to resolve the dispute through negotiations for a period of 30 calendar days following the receipt of the written notice defining and describing the nature of the dispute. In the event that the parties are unable to finally resolve the dispute within such 30 calendar-day period, the parties to the dispute may elect by mutual agreement to extend the period of negotiation and may elect by mutual agreement to engage a mediator to assist in such negotiation. To the extent that any matter remains unresolved following negotiations, the Stockholders’ Agent and Parent shall jointly select an independent accountant of recognized national standing to resolve any remaining disagreements, which independent accountant shall not have provided services to the Stockholder’ Agent, the Company or Parent during the five-year period preceding the date of its selection (the “Independent Accountant”). The Stockholders’ Agent and Parent shall use their respective commercially reasonable efforts to cause such Independent Accountant to make its determination within 30 calendar days of accepting its selection. Within 10 business days after the date of determination of such Independent Accountant, Parent shall pay or cause to be paid to the Holders the Earnout Payment Amount, if any, in the manner set forth herein, subject to the right of offset provisions of Sections 2.4(a), (b) and (d). The decision of the Independent Accountant shall be a final, binding, and conclusive resolution of the parties’ dispute, shall be non-appealable, and shall not be subject to further review. If the Independent Accountant’s decision indicates that the Holders are not entitled to the disputed portion of the Earnout Payment Amount, then all reasonable costs and expenses incurred by Parent in connection with the dispute, including all costs and expenses of the Independent Accountant shall be deducted by Parent from the Earnout Payment Amount. If the Independent Accountant’s decision indicates that the Holders are entitled to the disputed portion of the Earnout Payment Amount, then Parent shall be responsible for payment of all reasonable costs and expenses incurred by the Stockholders’ Agent in connection with the dispute, including all costs and expenses of the Independent Accountant.

(iv) The Holders will be deemed to, as part of their approval and adoption of the Merger Agreement and the transactions contemplated therein and herein, and the Stockholders’ Agent hereby, generally, irrevocably, unconditionally and completely agree that (1) the Company and Parent (as the controlling stockholder of the Company as of the Effective Time of the Merger) and each of their respective Affiliates shall be entitled to operate the Business after the Effective Time as they determine in their sole and absolute discretion, and shall have no obligation to operate the Business in any manner that would maximize, maintain or protect the value of the Common Stock CVRs and the Preferred Stock CVRs, and as a result of such operation of the Business, there may be a diminution in or elimination of the value of the CVRs, (2) the Common Stock CVRs and the Preferred Stock CVRs represent contractual obligations of Parent, and none of Parent, the Company, or any of their respective Affiliates owes any fiduciary duty of any type (including, without limitation, any duty of loyalty or care) to any Holder of Common Stock CVRs and/or Preferred Stock CVRs, (3) each of the Holders and the Stockholders’ Agent shall be prohibited from asserting any dispute, right, claim, action, cause of action, controversy or remedy of any kind and nature against any of the Company, Parent or any of their Affiliates resulting from the operation of the Business after the Effective Time or resulting from any allegation of breach of fiduciary duty of any nature, other than claims for fraud or intentional misconduct. Upon the occurrence of any claim which may arise for fraud or intentional misconduct under this subsection (iv) (in each case, a “Claim”), the Stockholders’ Agent shall provide notice of such Claim to Parent, stating the circumstances giving rise to the Claim, specifying the amount of the Claim and making a request for any payment then believed due (the “Notice”). Upon receipt of any such Notice by Parent, within the next 45 days thereafter, the parties shall use their reasonable best efforts to cooperate and arrive at a mutually acceptable resolution of such dispute. If a mutually acceptable resolution cannot be reached between the parties within such 45-day period, any Holder or the Stockholders’ Agent may submit the dispute for resolution by a panel of three arbitrators selected from the panels of arbitrators of the American Arbitration Association in Santa Xxxxx County, California; provided, however, that (i) one arbitrator shall be selected by the Stockholders’ Agent, the second arbitrator shall be selected by Parent and the third arbitrator shall be selected by the two previously selected arbitrators and (ii) in all respects, such panel shall be governed by the American Arbitration Association’s then existing Commercial Arbitration Rules. If it is finally determined that all or a portion of such Claim amount is owed to the Holders, Parent shall, within 10 days of such determination, pay the Holders such amount owed, together with interest from the date that the Stockholders’ Agent initially requested such payment until the date of actual payment, at an annual rate equal to the prime interest rate then generally in effect on the date of payment as set forth in The Wall Street Journal. The arbitration panel’s decision shall be final and binding upon the parties, and may be entered and enforced in any court of competent jurisdiction by any party. The parties shall be responsible for their respective attorneys’ fees incurred in connection with the arbitration; however, the parties agree that, to the extent

permitted by law, the arbitrator may, in his or her discretion, award reasonable attorneys’ fees to the prevailing party.

EACH HOLDER AND THE STOCKHOLDERS’ AGENT ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE FOR FRAUD OR INTENTIONAL MISCONDUCT UNDER THE PRECEDING SENTENCE IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE IT HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO FRAUD OR INTENTIONAL MISCONDUCT UNDER THE PRECEDING SENTENCE. EACH HOLDER AND THE STOCKHOLDERS’ AGENT CERTIFIES AND ACKNOWLEDGES THAT (A) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE SUCH WAIVER, (B) IT UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF SUCH WAIVER, AND (C) IT MAKES SUCH WAIVER VOLUNTARILY.

(v) Notwithstanding anything to the contrary set forth in this Section 2.4(c), in the event of a Change of Control (as defined below) of Parent before December 31, 2005, the Aggregate Earnout Payment Amount payable pursuant to this Section 2.4(c) shall be at least $14,000,000 regardless of the actual Net Revenue recognized during the Earnout Period, subject, however, to the offset provisions of Section 2.4(a), (b) and (d). In event of a Change of Control of Parent as set forth herein, Parent shall make proper provisions so that the continuing or surviving corporation or entity shall assume the obligation to pay the Aggregate Earnout Payment Amount as set forth herein. For purposes of this Section 2.4(c)(v), a “Change of Control” shall mean (1) the consummation of any transaction, including without limitation, any merger or consolidation, pursuant to which any of the voting stock of Parent is converted into or exchanged for cash, securities or other property, other than any transaction where the voting stock of Parent outstanding immediately prior to such transaction is converted into or exchanged for voting stock of the surviving or transferee entity constituting more than 50% of such voting stock of such surviving or transferee entity (immediately after giving effect to such issuance) and other than an acquisition of Parent in which the management of Parent participates in the equity of the acquiror; or (2) a sale of all or substantially all of Parent’s assets.

(d) Offset Against Earnout Payment.

(i) Each statement contained in any Schedule or certificate delivered by or on behalf of the Company pursuant to this Agreement or the Merger Agreement shall be deemed to be a representation and warranty by the Company contained in this Agreement and the Merger Agreement. The representations and warranties of the Company contained in Article 3 of the Merger Agreement shall

survive the Effective Time until March 30, 2006; provided, however, in the case of actual fraud, intentional misrepresentation or criminal activity, the representations and warranties of the Company shall survive until the expiration of the applicable statute of limitations. Any claims under this Agreement or the Merger Agreement with respect to a breach of a representation or warranty must be asserted by written notice within the applicable survival period contemplated by this Section 2.4(d)(i), and if such a notice is given, the survival period for such representation and warranty shall continue, solely with respect to such claim, until the claim is fully resolved. The right to recovery or other remedy based on the representations, warranties, covenants and agreements herein will not be affected by any investigation conducted with respect to, or any knowledge acquired by Parent or Merger Sub (or capable of being acquired) at any time, whether before or after the execution and delivery of this Agreement, the Merger Agreement or the Closing, with respect to the accuracy or inaccuracy of or compliance with any such representation, warranty, covenant or agreement. All representations and warranties of the Company set forth in this Agreement and the Merger Agreement shall be deemed to have been made again by the Company at and as of the Closing Date. The waiver of any condition based on the accuracy of any representation or warranty, or on the performance of or compliance with any covenant or agreement, will not affect the right to recovery or other remedy based on such representations, warranties, covenants and agreements, unless such right is also expressly waived.

(ii) Subsequent to the Closing, Parent and its respective Affiliates (including, after the Closing, the Company), and each of its respective officers, directors, employees, stockholders, partners and agents (the “Covered Parties”) shall be entitled to offset against the Earnout Payment Amount an amount in cash equal to the amount of any damage, claim, loss, cost, tax liability or expense, including, without limitation, interest, penalties, reasonable attorneys’ fees and expenses of investigation, response action, removal action or remedial action (including any consequential or punitive damages) (collectively “Damages”) incurred by the Covered Parties that arise out of or relate to, whether directly or indirectly: (i) any misrepresentation or breach of any warranty on the part of the Company contained in this Agreement, the Merger Agreement or in any Schedule or certificate delivered by or on behalf of the Company pursuant to this Agreement or the Merger Agreement, or (ii) any breach or non-performance by the Company of any of their respective covenants or agreements contained in this Agreement, the Merger Agreement or in any Schedule or certificate delivered by or on behalf of the Company pursuant to this Agreement or the Merger Agreement.

(iii) The term “Damages” as used in this Section 2.4(d) is not limited to matters asserted by third parties against the Covered Parties, but includes Damages incurred or sustained by such persons in the absence of third-party claims, and payments by a Covered Party shall not be a condition precedent to recovery.

(iv) Any Covered Party seeking recovery under Section 2.4(d) hereunder shall, within the relevant limitation period provided for in Section 2.4(d)(i) above, give to the Stockholders’ Representative a notice (a “Claim Notice”) describing in reasonable detail the facts giving rise to any claims for offset under Section 2.4(d) hereunder and shall include in such Claim Notice (if then known) the amount or the method of computation of the amount of such claim, and a reference to the provision of this Agreement or any agreement, certificate or instrument executed pursuant hereto or in connection herewith upon which such claim is based; provided, however, that a Claim Notice in respect of any action at law or suit in equity by or against a third Person as to which recovery will be sought shall be given promptly after the action or suit is commenced; andprovided further, that failure to give such notice shall not prejudice the rights of the Covered Parties hereunder except to the extent that the Holders shall have been materially prejudiced by such failure. In the event that any Claim Notice is delivered and thereafter any Earnout Payment Amount is required to be paid hereunder, payment shall not be required of that portion of the Earnout Payment Amount equal to the amount of outstanding claims (as determined by Parent in good faith, in its sole discretion) until such time as Parent’s right of offset under this Section 2.4(d) has been finally resolved.

(v) The Stockholders’ Representative shall have thirty (30) days after receipt of any Claim Notice pursuant hereto to (i) agree to the amount or method of determination set forth in the Claim Notice and agree that the amount set forth in the Claim Notice shall be offset by the Covered Parties against the Earnout Payment Amount in accordance with Section 2.4(d)(ii) hereof or (ii) to provide such Covered Party with notice that it disagrees with the amount or method of determination set forth in the Claim Notice (the “Offset Dispute Notice”). Within fifteen (15) days after the giving of any Dispute Notice, the Stockholders’ Representative and such Covered Party shall negotiate in a bona fide attempt to resolve the matter. If no Dispute Notice is given, then the claim in the amount alleged by the Covered Party in the Claim Notice shall be deemed to be valid and may be offset against the Earnout Payment Amount pursuant to Section 2.4(d)(ii) hereof. No claim shall be offset against the Earnout Payment Amount if such claim is timely disputed as set forth above, unless and until its validity is finally resolved.

(vi) If a claim by a third Person is made against a Covered Party, and if such Covered Party intends to seek a right of offset with respect thereto under this Section 2.4(d), such Covered Party shall promptly notify the Stockholders’ Representative in writing of such claims, setting forth such claims in reasonable detail. Failure to give such notice shall not prejudice the rights of the Covered Party hereunder except to the extent that the Holders shall have been materially prejudiced by such failure. The Covered Party shall have the right to undertake, at the Holders’ cost, risk and expense (which amounts the Covered Party shall be entitled to offset against the Earnout Payment Amount), the defense, compromise or settlement of the claim but shall not thereby waive any right of offset therefor pursuant to this Agreement.

(e) California Holdback Payment. As promptly as practicable after the expiration of all applicable statutes of limitations (and any extensions thereof) relating to the Company’s 2002 California tax return referred to in Section 5.14 of the Merger Agreement, Parent shall pay or cause to be paid the California Holdback Payment Amount.

Section 2.5 Payments on CVRs.

(a) If any CVR Payment Amount is determined to be payable in accordance with Section 2.4, Parent shall establish a CVR Payment Date with respect to such CVR Payment Amount that is within 15 days following the date on which it is determined that a CVR Payment Amount is payable. On such CVR Payment Date, Parent shall then deposit with the Rights Agent the CVR Payment Amount, and the Right Agent shall cause such amount to be delivered to each of the Holders entitled thereto by check mailed to the address of each Holder as reflected in the CVR Register as of the close of business on the last Business Day prior to such CVR Payment Date.

(b) The determination by Parent and the Rights Agent of any CVR Payment Amount pursuant to the procedures set forth in Section 2.4, absent a mathematical error, shall be final and binding on Parent and each Holder.

(c) Except in the specific cases specified in this Agreement, no interest shall accrue on any amounts payable on the CVRs to any Holder.

(d) Parent and the Rights Agent shall be entitled to deduct and withhold, or cause to be deducted or withheld, from the CVR Payment Amount otherwise payable pursuant to this Agreement such amounts as it is required to deduct and withhold with respect to the making of such payment under the Code, or any provision of state, local or foreign tax law. To the extent that amounts are so withheld or paid over to or deposited with the relevant governmental entity, such withheld amounts shall be treated for all purposes of this Agreement as having been paid to the Holder in respect of which such deduction and withholding was made.

ARTICLE III.

THE RIGHTS AGENT

Section 3.1 Certain Duties and Responsibilities.

(a) The Rights Agent undertakes to perform such duties and only such duties as are specifically set forth in this Agreement. The Rights Agent shall exercise such of the rights and powers vested in it by this Agreement, and use the same degree of care and skill in its exercise, as a prudent man would exercise or use under the circumstances in the conduct of his own affairs; provided, however, that the Rights Agent shall not be liable for any acts or omissions except to the extent that the Rights Agent has engaged in willful misconduct or bad faith.

(b) No provision of this Agreement shall be construed to relieve the Rights Agent from liability for its own willful misconduct or bad faith, except that no provision of this Agreement shall require the Rights Agent to expend or risk its own funds or otherwise incur any

financial liability in the performance of any of their duties hereunder or in the exercise of any of their rights or powers.

Section 3.2 Certain Rights of Rights Agent; Actions of the Rights Agent. The Rights Agent undertakes to perform such duties and only such duties as are specifically set forth in this Agreement, and no implied covenants or obligations shall be read into this Agreement against the Rights Agent. In addition:

(a) the Rights Agent may rely and shall be protected in acting or refraining from acting upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order or other paper or document believed by it to be genuine and to have been signed or presented by the proper party or parties;

(b) whenever the Rights Agent shall deem it desirable that a matter be proved or established prior to taking, suffering or omitting any action hereunder, the Rights Agent may, in the absence of bad faith or willful misconduct on its part, rely upon an Officer’s Certificate;

(c) the Rights Agent may engage and consult with counsel of its selection and the written advice of such counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon; and

(d) the Rights Agent may engage and consult with accounting firms, tax experts, valuation firms and other experts and third parties that it, in their sole and absolute discretion, deem appropriate or necessary to enable it to discharge its duties hereunder.

Section 3.3 Not Responsible for Recitals or Issuance of CVRs. The recitals contained herein shall be taken as the statements of Parent, and the Rights Agent assume no responsibility for their correctness. The Rights Agent makes no representations as to the validity or sufficiency of this Agreement or the CVRs.

Section 3.4 Compensation, Reimbursement and Indemnification of the Rights Agent. Parent agrees that the following shall be payable by Parent and the Stockholders’ Agent, split equally between them:

(a) except as otherwise expressly provided herein, to pay to or on behalf of the Rights Agent, upon the request of the Rights Agent, all reasonable expenses and disbursements incurred or to be incurred by the Rights Agent in connection with the discharge of its duties under this Agreement (including, without limitation, the reasonable compensation and the expenses and disbursements of its counsel, tax experts, valuation firms and other experts and third parties as contemplated in Section 3.2 and including premiums paid from time to time for liability insurance coverage for such Rights Agent); and

(b) to indemnify the Rights Agent and hold it harmless from and against any and all liabilities, obligations, losses, damages, penalties, actions, judgments, suits, costs, reasonable expenses and reasonable disbursements of any kind or nature whatsoever (including, without limitation, the reasonable compensation and the expenses and disbursements of its counsel, tax experts, valuation firms and other experts and third parties as contemplated in

Section 3.2) that may be imposed on, asserted against or incurred by them under this Agreement, and the Rights Agent shall be so indemnified under this Agreement for its own ordinary or gross negligence, but the Rights Agent does not have the right to be indemnified under this Agreement for its own willful misconduct or bad faith.

Section 3.5 Resignation and Removal; Appointment of Successor.

(a) The Rights Agent may resign at any time by giving written notice thereof to Parent.

(b) The Rights Agent may be removed at any time by Act of the Holders of a majority of the outstanding CVRs that are delivered to the Rights Agent and Parent.

(c) If at any time the Rights Agent shall become incapable of acting, any Holder of a CVR may, on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the removal of the Rights Agent and the appointment of a successor Rights Agent.

(d) In the event that the Rights Agent resigns, is removed or becomes incapable of acting, then such Rights Agent shall not be entitled to any compensation payable pursuant to Section 3.4 from and after the date of his resignation or removal.

(e) Parent shall give notice of each resignation and each removal of a Rights Agent and each appointment of a successor Rights Agent by mailing written notice of such event by first-class mail, postage prepaid, to the Holders as their names and addresses appear in the CVR Register. Each notice shall include the name and address of the successor Rights Agent. If Parent fails to send such notice within ten days after acceptance of appointment by a successor Rights Agent, the successor Rights Agent shall cause the notice to be mailed at the expense of Parent.

Section 3.6 Acceptance of Appointment by Successor. Each successor Rights Agent appointed hereunder shall execute, acknowledge and deliver to Parent and to the retiring Rights Agent an instrument accepting such appointment and a counterpart of this Agreement, and thereupon such successor Rights Agent, without any further act, deed or conveyance, shall become vested with all the rights, powers, trusts and duties of the retiring Rights Agent; but, on request of Parent or the successor Rights Agent, such retiring Rights Agent shall execute and deliver an instrument transferring to such successor Rights Agent all the rights, powers and trusts of the retiring Rights Agent.

ARTICLE IV.

HOLDERS’ LISTS AND REPORTS BY RIGHTS AGENT AND PARENT

Section 4.1 Parent to Furnish Rights Agent with Names and Addresses of Holders. Parent shall furnish or cause to be furnished to the Rights Agent (a) in such form as the Rights Agent may reasonably require, the names and addresses of the Holders within 15 days of the Effective Time, and (b) at such times as the Rights Agent may request in writing, within five days after receipt by Parent of any such request, a list, in such form as the Rights Agent may

reasonably require, of the names and the addresses of the Holders as of a date not more than 15 days prior to the time such list is furnished.

ARTICLE V.

COVENANT

Section 5.1 Federal Income Tax Treatment. Parent (and each of its Affiliates) shall for federal income tax purposes treat any CVR Payment Amount as a payment made in connection with the acquisition of Company Common Stock and Company Series B Preferred Stock, to the extent required by the Code, and Parent (and each of its Affiliates) shall file any tax return reporting the CVR Payment Amount consistent with such treatment.

ARTICLE VI.

AMENDMENTS

Section 6.1 Amendments Without Consent of Holders.

(a) Without the consent of any Holders, Parent, when authorized by a Board Resolution, and the Rights Agent, in the Rights Agent’s sole and absolute discretion, at any time and from time to time, may enter into one or more amendments hereto, for any of the following purposes:

(i) to evidence the succession of another Person to Parent and the assumption by any such successor of the covenants of Parent herein; provided that such succession and assumption is in accordance with the terms of this Agreement;

(ii) to evidence the succession of another Person as a successor Rights Agent and the assumption by any successor of the covenants and obligations of such Rights Agent herein; provided, that such succession and assumption is in accordance with the terms of this Agreement;

(iii) to add to the covenants of Parent such further covenants, restrictions, conditions or provisions as the Board of Directors and the Rights Agent shall consider to be for the protection of the Holders; provided that in each case, such provisions shall not adversely affect the interests of the Holders;

(iv) to cure any ambiguity, to correct or supplement any provision herein that may be defective or inconsistent with any other provision herein, or to make any other provisions with respect to matters or questions arising under this Agreement; provided that in each case, such provisions shall not materially adversely affect the interests of the Holders; or

(v) as may be necessary or appropriate to ensure that the CVRs are not subject to registration under the Securities Act or the Exchange Act, as amended, provided that that such provisions shall not materially adversely affect the interests of the Holders.

(b) Promptly after the execution by Parent and the Rights Agent of any amendment pursuant to the provisions of this Section 6.1, Parent shall mail a notice thereof by first class mail to the Holders at their addresses as they shall appear on the CVR Register, setting forth in general terms the substance of such amendment.

Section 6.2 Amendments with Consent of Holders.

(a) With the consent of the Holders of not less than a majority of the outstanding CVRs, by Act of such Holders delivered to Parent and the Rights Agent, Parent, (when authorized by a Board Resolution) and the Rights Agent may enter into one or more amendments hereto for the purpose of adding, eliminating or changing any provisions of this Agreement if such addition, elimination or change is in any way adverse to the interest of the Holders.

(b) It shall not be necessary for any Act of Holders under this Section 6.2 to approve the particular form of any proposed amendment, but it shall be sufficient if such Act shall approve the substance thereof.

(c) Promptly after the execution by Parent and the Rights Agent of any amendment pursuant to the provisions of this Section 6.2, Parent shall mail a notice thereof by first class mail to the Holders at their addresses as they shall appear on the CVR Register, setting forth in general terms the substance of such amendment.

Section 6.3 Execution of Amendments. In executing any amendment permitted by this Article VI, the Rights Agent shall be entitled to receive, and shall be fully protected in relying upon, an Opinion of Counsel stating that the execution of such amendment is authorized or permitted by this Agreement. The Rights Agent may, but is not obligated to, enter into any such amendment that affects the Rights Agent’s own rights, privileges, covenants or duties under this Agreement or otherwise.

Section 6.4 Effect of Amendments. Upon the execution of any amendment under this Article, this Agreement shall be modified in accordance therewith, such amendment shall form a part of this Agreement for all purposes and every Holder shall be bound thereby.

ARTICLE VII.

CONSOLIDATION, MERGER, SALE OR CONVEYANCE;

JOINT AND SEVERAL RESPONSIBILITY

Section 7.1 Parent and the Company May Consolidate, Etc.

(a) Parent and Company shall not consolidate with or merge into any other Person or convey, transfer or lease its properties and assets substantially as an entirety to any Person, unless:

(i) Parent or the Company shall consolidate with or merge into any other Person or convey, transfer or lease its properties and assets substantially as an entirety to any Person, the Person formed by such consolidation or into which Parent or Company is merged or the Person that acquires by conveyance or

transfer, or that leases, the properties and assets of Parent or Company substantially as an entirety (the “Surviving Person”) shall expressly assume payment of amounts on all the CVRs and the performance of every duty and covenant of this Agreement on the part of Parent or the Company to be performed or observed; and

(ii) Parent or the Company has delivered to the Rights Agent an Officer’s Certificate, stating that such consolidation, merger, conveyance, transfer or lease complies with this Article VII and that all conditions precedent herein provided for relating to such transaction have been complied with.

(b) For purposes of this Section 7.1, “convey, transfer or lease its properties and assets substantially as an entirety” shall mean properties and assets contributing in the aggregate at least 80% of Parent’s or the Company’s total consolidated revenues as reported in Parent’s or the Company’s last available periodic financial report (quarterly or annual, as the case may be).

Section 7.2 Successor Substituted. Upon any consolidation of or merger by Parent with or into any other Person, or any conveyance, transfer or lease of the properties and assets substantially as an entirety to any Person in accordance with Section 7.1, the Surviving Person shall succeed to, and be substituted for, and may exercise every right and power of, Parent under this Agreement with the same effect as if the Surviving Person had been named as Parent herein, and thereafter, except in the case of a lease, the predecessor Person shall be relieved of all obligations and covenants under this Agreement and the CVRs.

Section 7.3 Joint and Several Responsibility. Parent, the Company and Merger Sub are jointly and severally responsible for the performance of all actions, and the payment of all sums, required under this Agreement of either such party.

Section 7.4 No Liability. None of Parent, Merger Sub, or the Company shall be liable to any person in respect of any cash delivered to a public official pursuant to any applicable abandoned property, escheat or similar law. All funds held for payment to the Holders and unclaimed at the end of one year after the applicable CVR Payment Date shall be returned to Parent, after which time any Holder shall look as a general creditor only to Parent for payment of the CVR Payment Amount (without any interest being payable thereon) to which such Holder may be due, subject to applicable law. Any amounts remaining unclaimed by Holders seven years after the applicable CVR Payment Date (or such earlier date immediately before that time when the amounts would otherwise escheat to or become property of any governmental authority) shall become, to the extent permitted by applicable law, the property of Parent free and clear of any claims or interest of any person previously (or subsequently claiming to be) entitled thereto.

ARTICLE VIII.

STOCKHOLDERS’ AGENT

Section 8.1 Designation; Duties. The Holders will be deemed to have authorized, designated and appointed, as part of their approval and adoption of the Merger Agreement and

the transactions contemplated therein and herein, the Stockholders’ Agent to act as the sole and exclusive agent, attorney-in-fact and representative of each of the Holders by the consent of the Holders and as such is hereby authorized and directed to (a) take any and all actions (including without limitation executing and delivering any documents, incurring any costs and expenses for the account of the Holders and making any and all determinations required by this Agreement) which may be required in carrying out his duties under this Agreement, (b) give notices and communications on behalf of the Holders as set forth in this Agreement, (c) notify Parent of any claim which may arise for fraud or intentional misconduct under Section 2.4(c)(iv) hereof, (d) exercise such other rights, power and authority as are authorized, delegated and granted to the Stockholders’ Agent under this Agreement in connection with the transactions contemplated by the Merger Agreement and hereby, and (e) exercise such rights, power and authority as are incidental to the foregoing, and any decision or determination made by the Stockholders’ Agent consistent therewith shall be absolutely and irrevocably binding on each Holder as if such Holder personally had taken such action, exercised such rights, power or authority or made such decision or determination in such Holder’s individual capacity.

Section 8.2 Removal; Successor Stockholders’ Agent. The Stockholders’ Agent may be removed at any time by Act of the Holders of a majority of the outstanding CVRs (the “Majority Holders”). In the event the Majority Holders determine to remove the Stockholders’ Agent, the Majority Holders shall give notice of the removal of the Stockholders’ Agent and the appointment of any successor Stockholders’ Agent by mailing written notice of such event by first-class mail to Parent. Any such notice shall include the name and address of the successor Stockholders’ Agent. Any successor Stockholders’ Agent appointed hereunder shall execute, acknowledge and deliver to Parent an instrument accepting such appointment and a counterpart of this Agreement, and thereupon such successor Stockholders’ Agent shall be become vested with the powers of the prior Stockholders’ Agent.

Section 8.3 No Liability. The Stockholders’ Agent shall have no duties towards the Holders, and shall not incur any liability to the Holders, and the Holders shall have no claims, including those that may arise in the future, against the Stockholders’ Agent for any action or inaction taken or not taken by him in connection with his service as the Stockholders’ Agent, except to the extent that such action or inaction shall have been held by a court of competent jurisdiction to constitute willful misconduct. A decision, act, consent or instruction of the Stockholders’ Agent shall constitute a decision of all Holders and shall be final, binding and conclusive upon each such Holder, and Parent may rely upon any decision, act, consent or instruction of the Stockholders’ Agent as being the decision, act, consent or instruction of each and every such Holder. Parent is hereby relieved from any liability to any person for any acts done by it in accordance with such decision, act, consent or instruction of the Stockholders’ Agent.

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as of the date first above written.

ARTHROCARE CORPORATION

By:


Name:


Title:

ALPHA MERGER SUB CORPORATION

By:


Name:


Title:

MEDICAL DEVICE ALLIANCE INC.

By:


Name:


Title:




as Rights Agent



as Stockholders’ Agent

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CONTINGENT VALUE RIGHTS AGREEMENT

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