Are you saying you are using hd with windows on them and swapping in and out of the new build? I think you need to go square 1. Pick a drive as your primary, format it and start over. What OS do you want on this build XP?
OK - thanks to everyone, but I owe DogSnake a pizza!
A variation of your suggestion worked.
I re-installed Win7, didn't think it would work as all I have is a Win 7 upgrade disk and you need to have Win XP installed first, but it worked!!!!
Everything is running as it should.
Thanks to all!