We can't tell you how to use ISO's since it's against the rules. And there isn't a working PS1 emulator yet. But the best snes emulator is SnesTYL 4.2 me. Nes- Nester J. GBA- gPSP. Download them all here psp-news.dcemu.co.uk/ (left hand bar). And to run them stick them both folders in your PSP/GAME folder.
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