I've ripped GTA IV to my harddrive, and upon running, it brings up the black screen that normally comes up for GTA IV(with all the publication information), and then turns off my xbox. I've tried putting the game on an external(becuase that works for Fable 3[AP 2.5 issues]), did nothing. I've re-ripped the disc multiple times same effect. Game runs fine from cd. I've read other people complain about this as well, however they said they switched between xboxs' and GTA IV ran fine on one and not the other. So if you can run GTA IV from hdd on jtag, please post what motherboard revision you have as well. other games have similar issues like left 4 dead 2 and left 4 dead. Any ideas?