me-8/pro-b8

Hey there, I've been fiddling around with ME-8 and PRO-B8 on my PSP 3000. They both seem to work, I've managed to run SNES9X Euphoria without any problems, but every time I try to run an iso or cso, it doesn't work. I've tried putting it in an ISO folder in the root, in the GAME folder, in the...