Got it booted into Dingo (bypassing setup using the "4 corners" trick). Plugged in the USB drive and verified that it could 1) read the drive (yes), and 2) that update.zip is present (yes). However it still won't get to the "updating software" screen when holding Menu+Rotate.
Also, can someone tell me the differences between the following firmware files?
pocketedgeermineupdate.zip
p-update.zip.ermine-0.9.zip
p-update.golden.zip
PocketEdge_updates_by_Mark_Rehorst.zip
Sorry for the multiple posts, I just saw the edit button
Edit: Finally got it to update from an SD card. Weird that one would use USB and the other wouldn't. I'd still like some info on the various firmwares available.
Thanks! Now I'm off to get these set up for my mom and li'l sis.