There is one more possibility
Well mate.. Indeed a lot has been messed up.. But there is one more possibility.. But there are some pre-requisites to it.. First u should b using windows xp without any service pack installed, u should be using the PIRATED copy of windows XP (here's when software piracy will come 2 rescue), and u should have the windows 2000 professional bootable cd. If u meet all these requirements, then follow these steps.. Boot from the win2k disk into the recovery console. It will take u directly into the admin account WITHOUT ASKING FOR ANY PASSWORD (yes.. Its true)... Once in, you'll be able to access all ur drives.. Just take a backup of all ur documents on both ur drives, then format both drives and reinstall xp. Do tell me if this works.. Cheers!!!