[soondai]

edit: 1st thing I'd try is what tselling is suggesting: reflash again w/o the external SD and see if this makes the apps work /edit

when you say the preloaded apps don't work, it makes me think maybe you only flashed the official firmware once. when moving from the stock 2010 to official OP 2011, you have to flash twice for the apps to work (the updater tells you to do it a second time if it's necessary, but it's not very clear and people have missed it)

but since you have SAM working, maybe that's not it.

since you are having problems with the firmware itself (not just the mod), maybe try over.

if it were me, I would do a factory reset (clear all data thru tools>>privacy) and go back to Pandigital and update again (choosing redownloading the file when it tells you it is already there). If after you think you're done the apps still don't work, reflash again doing the power/volume pinch. Once you get that up and running, you can retry the kewlguy stuff.

good luck.