huh? are you sayign you put the emulator + games on your xbox and can play it on the xbox? or you burn super nintendo games onto cds tht play through the box?
http://forums.xbox-scene.com/index.php?showtopic=215055 - if you dont feel like opening your xbox and soldering or messing around with wires and whatnot.
http://www.xbox-scene.com/articles/xbins.php - to get the emulators and dashboards and trainers and media centers and demos and the list goes on and on. You can get 360 mods there too.
Then you use one of the emulation websites or limewire to get the roms.
I think I have a 250 or 320 gb hard drive in mine. I honestly dont remember. I know I have 100 gb left on each of my main partitions though