Yes you can use a SNES emulator on a PSP but you need a hacked psp or a psp that will accept homebrew. There are many snes emulators for a psp. I have only provided one on the link below.
Just copy and paste the link below.
http://www.evilpsp.com/files/s9xTYLslimmecm.zip
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First find out how to hack your PSP so it can run homebrew applications. Then download the SNES emulator for PSP. Now go to any torrent or ROM site and download any of the games that you want. Load them on to the PSP and have fun!
Yes there is a PSP emulator. To get one, copy and paste the link below and choose the emulator you like. http://www.emulator-zone.com/doc.php/psp/
There is a emulator at http://www.emulator-zone.com/doc.php/psp/ you will need to have the game files on your computer. there may be a program that gets the games off your psp source : i found out about emulator zone on tinkernut.com
you put it in the game section
According to the reliable website, The Emulator Zone, there are two top programs to choose from that score the highest. ZSNES with a score of 9 out of 10 SNES9x with a core of 8.5 out of 10