Not that anon but I had not one but TWO Nes emulators on the PSX (And one Master System emulator).
The one on the pic (pNesX) was pretty bad, it had graphical glitches with every game (apparently it had issues with flipping sprites incorrectly?) This was especially bad in games with parallax background. Some games didn't run at all. I played all the Megamans except 2 because it was the only one who couldn't run in that piece of crap. Still, I really appreciate it because it was my start in the emulation world.
The second emulator? I can't even remember how it was called or anything, but it had yellow letters with a blue background. This was a lot better and all the bugs of the other emulator were eliminated. The disk also came with more preloaded games than the other one.
And finally, the Master System emulator I can't remember how it was called either, but I had fun with it. It had an annoying issue where the sound would play at like 300% of what a regular game would play, which was really annoying.