Changing boot drive

I have windows 98se on C:(master) and windows xp pro on D:(slave). These are seperate hard drives. I now wish to remove 98se and reformat the drive and only use xp. My problem is that all the boot files are on c: and I am not sure how to make d: theboot drive. I have edited the boot.ini file to delete the dual boot and it now boots straight to xp, but I have not figured which files to move to d: to make it the bootable drive. I also tried to change the boot sequence in the bios but that would have made it too simple.
Any suggestions would be appreciated

Thanks in advance

Tim Hadden