Is it possible to place a ps emu on a nintendo ds?

[Niborsom]

Hello.
As the title reads, is it possible to get a playstation emulator on the nintendo ds, along with a game I've played a lot, and still love, and play it?

My hopes are few, but I thought maybe there's a way..

Greetings,
Niborsom

ps. I know a playstation has more buttons then a nintendo ds, but didn't the old snes also have more buttons? And you won't need all anyway.. :P