Snes Station
I have tried this ages ago, going back for a look if they updated it but I bet they didn't. It had some real issues when playing with the sound on. Sound reduced the framerate to something similar to Doom 3 with an FX5200
With the sound off it is ok. Overall, I didn't like it too much. The PS2 can easily handle those old games, but somehow they managed to program it poorly so it wouldn't.
Give it a shot nevertheless.
EDIT: I
think there has been an update.