I lost my code for Halo. I'm bored to death of playing the demo version and I want to play the full version. Is there a way to extract the code from the disk, buy a new code or even buy a new copy of halo? I'm pissed that I paid $20 for this thing and can't even play it anymore! Amazon lists it for $100!!! No way in hell is a $20 game worth that much. Yes, this is a REAL CD, not a pirate.