Back to P2

I'm looking for the best way to put footage back onto the P2 card....both an edited video that can play back on my P2 Mobile (they did it with the Iditarod program at a Panny seminar, but I didn't ask how) and I'd like to take a P2 card I offloaded to drive and put it back on the P2 card. Thanks!

HPX-2000 w/AVC board
P2 Mobile with AVC board
MBP 10.5