Oh I forgot, you'll need a special version of Goldeneye, MechAssault or Splinter Cell. I picked up MechAssault off ebay a long time ago for a few bucks (I messaged the seller asking for the serial on the disk to make sure it was a valid version).
I used
http://alive.atari.org/alive12/xbox.php up until the point at which the exploit is run off the game, then this video to guide me through the installation process:
http://video.google.com/videoplay?docid=7055566905625842780&q=zzk2001 (I just preferred seeing a visual guide).
If you want the specific files I used then PM/WLM me and I'll see what I can do.