EXHIBIT I: Agreement pursuant to Rule 13d-1(f) filed herewith Pursuant to Rule 13d-1(f) of Regulation 13D-G of the General Rules and Regulations of the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended, the...

EXHIBIT I:    Agreement pursuant to Rule 13d-1(f) filed herewith


        Pursuant to Rule 13d-1(f) of Regulation 13D-G of the General
Rules and Regulations of the Securities and Exchange Commission under the
Securities Exchange Act of 1934, as amended, the undersigned agree that
the statement to which this Exhibit is attached is filed on behalf of
each of them in the capacities set forth below.


                                            MAFCO HOLDINGS INC.

                                            By: /s/ Xxxxx X. Xxxxx
                                            -----------------------------
                                            Name:  Xxxxx X. Xxxxx
                                            Title: Vice President


                                            PX HOLDING CORPORATION

                                            By: /s/ Xxxxx X. Xxxxx
                                            -----------------------------
                                            Name:  Xxxxx X. Xxxxx
                                            Title: Vice President


                                            PX MERGER CORPORATION

                                            By: /s/ Xxxxx X. Xxxxx
                                            -----------------------------
                                            Name:  Xxxxx X. Xxxxx
                                            Title: Vice President