I see. Although I think that time estimate is a bit on the short side... not only does he need reinstall the OS (about 35 minutes according to the installer, assuming it's XP or Vista), but after that he'll need to set it up again with his user account, transfer his files back over, reinstall and reconfigure all his old programs, etc. Don't forget those updates either... remember how big Windows service packs are? If you combine all the update sizes, it's probably either very close to or more than the size of the ophcrack live cd. But if bandwidth is a problem, he can also just download puppy, install jtr to the live cd, and let it run on the sam. Either way, cracking will most likely be easier/faster than a complete reinstall. But I guess both will get the job done, in the long run.