What's even more likely to work is an NES emulator. The good things about this are:
1) The original makers of the game aren't making money from them at all, so there's no way you're reducing their business, so they're unlikely to pursue you (I hear that Nintendo's stance on emulation is "loud, but passive").
2) You get access to all of the good Megaman games, the Ninja Gaiden games, the Mario games...
3) NES games use fewer buttons. Using a keyboard for SNES games can be annoying.
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1) The original makers of the game aren't making money from them at all, so there's no way you're reducing their business, so they're unlikely to pursue you (I hear that Nintendo's stance on emulation is "loud, but passive").
2) You get access to all of the good Megaman games, the Ninja Gaiden games, the Mario games...
3) NES games use fewer buttons. Using a keyboard for SNES games can be annoying.
4) NES games are small. Yay hard drive space!