Flash2 contains your activation keys (they put them in flash2 to make sure people don't just pass them around, like they would if the keys were on the memory stick), sounds like they were wiped (I don't know exactly how the downgrade method works as I just pandora when I need to). I wouldn't know where to go from here as I've not done anything other than demos from PSN (which I can just re-activate when I want to), can you redownload them? I don't know if there's some way to "crack" them.