Well, im glad you ask.
I have a modded Xbox (The old model). in it, i have mounted a 750gb hdd, so i can put just about any kind of files on it. I've also installed XBMC (Xbox Media Center) on it, and it works like the easiest operation system in the world.
From here i just installed the Winuaex emulator for Xbox, and copied a but-load of roms to the hdd.
From here, it's just "game-on".
And now, when my Xbox has been inactive for approximately 5 minutes, it starts showing random Amiga cover scans... how sweet is that!!

If you need some more info, just ask!
Oh by the way, check out this skin in using atm:
http://blackbolt.x-scene.com/Jezz_X/MARK-III/Daniel