I just got a 2.71 fw TA-82 mobo psp and successfully downgraded it to 1.5 and back up to 3.10 OE-A'. I've tried to play some games by putting the ISOs in the ISO folder of the memory stick, I get the error "The game could not be started. (80020321)" on all my games. I went to the configuration mode and enabled no-umd starting, now one of my games works (evolution pro 2007) but gta liberty city stories just freezes when i press x, after showing me the psp logo. I can see the games in the memory stick section of the games submenu, and the and see the intro scenes but when i try to play it, the screen goes blank and i have to restart. Do i need a umd to play these games or am i missing something?
Thanks all in advance!