yeah, if you are computer illiterate, you probably wont be able to get an emulator running, but if you have any sense whatsoever, you should be able to figure it out...
you need to download the emulator for the system that you want to play, i.e. SNES, NES, Game Boy, Sega, whatever... then you need to download the game in the form of a ROM,
now keep in mind, you are only 'allowed' to keep the ROM for 24 hours, unless you own the game, sorry, thats my little disclaimer there...
~PhUnKiN PhAtT PhReErIdEr~
Oh no! Hostess Fruit Pies?!