I just recently downgraded to PSP 1.50 from 2.60. My PSP did not brick (as it can turn on) but now I cannot play my nester emulator (I have the same problem with other homebrews). Every time I go from my memory stick to nester, it attempts to load up, then beeps at me and says "The game could not be started. (80020001)). How do I fix this? I would appreciate any help I could get. Thanks so much!