I had the same setup as you and after a bit of research this is how I done it.
The first thing I came up with was this from another forum:
QUOTE
with vista still fully installed, boot to your XP installation
go to start -> run and type "c:\boot\fixntfs -xp" (without the quotes) click ok, and reboot the system
when the system reboots you should notice the bootloader has gone
boot back into xp again and go to disk management
select the drive you have vista installed on, right click it and select format.
then, go to windows explorer and delete these files from the root of your xp drive or partition:
boot (folder)
boot.bak
bootmgr
bootsect.bak
right click on 'My Computer',
select properties -> advanced -> startup and recovery settings, and under system startup, make sure that windows xp is selected as the default
If you don't have the fixntfs file (I didn't) then you can download it from another Neowin thread about uninstalling vista:
fixntfs.zipThe post it came from is here:
http://www.neowin.net/forum/index.php?show...hl=fixntfs&st=0After doing all this I still had some problems with booting so what i done was to insert my xp disk and go to the recovery console and use the
Fixboot c: command to get rid of the last bits of Vista and get XP booting on its own again.
No data will be lost on your c: drive and your current xp configuration with software installed and files saved will not be altered at all.
Hope this helps