I bought a PSP, 2.60 and having some legal copies of UMD games. Please explain in detail how I can play my PSP and PSone back-up games(ISO), my PSP firmware is 2.60. If possible, please explain step-by-step. I've read many threads focusing on this issue, but I'm so confused. I don't know if I have to downgrade my PSP from firmware 2.60 to 1.5 or I can upgrade directly from 2.60 to 3xxx (custom firmware). Some one told me that I update my PSP to 2.80 (Sony firmware), downgrade it to 1.5, then update to custom firmware 3.xxx. But I have no clue.