EXHIBIT 2 CUSIP No. 690370101 AGREEMENT CONCERNING JOINT FILING OF SCHEDULE 13G The undersigned agree as follows: (i) each of them is individually eligible to use the Schedule 13G to which this Exhibit is attached, and such Schedule 13G is filed on...Agreement Concerning Joint Filing of Schedule 13g • February 14th, 2007 • Chou Associates Management Inc. • Retail-catalog & mail-order houses
