I have installed the X3 in an xbox; I have done many of these. I have copied all of the files off of the original hard drive and have coppied them back onto the new hard drive (WD 160 gig). My problem is getting it to boot up with the X3 switched off. I have locked the drive, which is usaly the problem in most casses but it still gives me the error 12 messege telling me to contact MS. If anyone knows what i am missing please let me know. THANKS!!!