Remove win 7 from dual boot with win xp on different disks

I am currently booting Win xp and Win 7 from two drives ("C" and "F"). The System boots from the "F" drive (according to the BCD). In another post in this Forum I noted that I was trying to copy my Win xp as a virtual machine to a new computer, but since the boot information is actually on another disk, I have not been able to restore the proper boot configuration on the Win xp even with the EasyRE disk from NeoSmart while it is a virtual machine. I am now considering removing the dual boot and getting Win xp to boot correctly and then making it into a virtual machine and moving it to my new machine.
So the bottom line is: How do I do this?
Thank you!