How to play iso/cso games on psp 3000 6.20?

October 30, 2010 7:58pm CST
I have a problem about ofw 6.20 on my psp 3000. I accidently updated it to 6.20 and got stuck with it. I have lots of games on psp and it doesn't work anymore. I saw many guys using 6.20 Wolo's exploit to play Gameboy's game and use Patapon 2 to access to it, but that's not what I want. Are there any method, or ways to fix this problem?
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