Upgrade to Archos 605 works just fine
Following up my own post, because I like talking to myself.
First, back to the old PocketDish 402 unit, it turns out the recordings are NOT being transferred successfully, they are only partially being transferred.
After doing some eBay searching around, consider another PocketDish model as an alternative (maybe my 402 is bad?), I stumbled on the fact that Archos does offer a 'plug-in' for their GEN5 series (405, 605, 705), which enables transfers from the VIP 622 DVR (and one other, can't remember which). So, I took a little leap, and bought a used Archos 605 on eBay.
End result: Transfers to the 605 unit are working perfectly. And, I've got a much more capable player than the old PD 402 (touch screen, WiFi, 30G HD, etc). So, I'm leaving the PocketDish 402 behind, as most of the tech support people had suggested anyway. (grumble)
(And, this means I don't have to replace my 622 DVR, which I felt was unnecessary, and misguided suggestion by Dish)