Please help I bought a new psp, System Software 3.03 OE-B, my mate put firmware on and gave me some ISOs I was then happy playing with these ISOs on a 1GB mem stick. However I bought another psp for my nephew and gave him this mem stick after my mate put the firmware on it. I bought a 2GB mem stick and copied and pasted everything from the 1GB mem stick but when I go to put the ISO games on it, it doesn't work anymore!!!! Can someone please explain why????