If you have XP on C: and Vista on D: then you don't have to reinstall anything. Just boot up on XP and reformat the d drive. The only problem I see with that is that you will still have the duel-boot menu. You need to edit the boot.ini file found in c:\ root directory. Here's the one on my computer
;
;Warning: Boot.ini is used on Windows XP and earlier operating systems.
;Warning: Use BCDEDIT.exe to modify Windows Vista boot options.
;
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /FASTDETECT /NOEXECUTE=OPTIN
Not certain what you have to do to that file to remove the Vista option, but whatever you do make sure you have another copy of boot.ini before editing it.
Ancient Dragon
Retired & Loving It
30,047 posts since Aug 2005
Reputation Points: 5,662
Solved Threads: 2,342