roms on psp firmware 2.01 ?

Hi,

I got a psp yesterday, never used one before.
Not really interested in the titles for psp (got it as a freebie with a
cellphone contract), but I do have a small collection of snes roms, and
I've seen emulators for snes roms on psp before, but cant seem to find
one that works with my firmware (2.01). Also, can't seem to find a
downgrader for this particular version...

If anyone has info on this I would really appreciate it...I would
loooooove to play some oldies on this thing.

Thanks
-dt