I just got a refurbished PSP, it came with Sony's Firmware 3.51, I want to play some of the games that I've downloaded but I'm not sure where to start. Do I need to get rid of the 3.51 firmware? Or can I just copy games to the memory card. I've tried to create an ISO folder but the game doesn't come up. I feel like such a n00b! For the love of god help me!!!!