Exhibit 1
JOINT FILING AGREEMENT
PURSUANT TO RULE 13d-1(k)
The undersigned acknowledge and agree that the foregoing statement on
Schedule 13D is filed on behalf of each of the undersigned and that all
subsequent amendments to this statement on Schedule 13D may be filed on behalf
of each of the undersigned without the necessity of filing additional joint
filing agreements. The undersigned acknowledge that each shall be responsible
for the timely filing of such amendments, and for the completeness and accuracy
of the information concerning him or it contained herein or therein, but shall
not be responsible for the completeness and accuracy of the information
concerning the others, except to the extent that he or it knows or has reason to
believe that such information is inaccurate.
Dated: February 4, 2008
PNG HOLDINGS LLC
By: FIF V VOTECO LLC
its managing member
By: /s/ Xxxxxx Xxxxxxx
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Name: Xxxxxx Xxxxxxx
Title: Member
FIF V VOTECO LLC
By: /s/ Xxxxxx Xxxxxxx
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Name: Xxxxxx Xxxxxxx
Title: Member
CENTERBRIDGE VOTECO LLC
By: /s/ Xxxx Xxxxxxxx
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Name: Xxxx Xxxxxxxx
Title: Member
