OK, I've backed up the HD, I've ghosted XP onto the new HD and I have put back into the old computer with the new XP install on it...
But once again, just to top it all off it aint working... here's what's happening:
I turn on the computer.
The memory screen appears, the screen with writing appears on a black background.
It then says the computer didn't shut down properly... I click either start in Safe Mode or Start Windows Normally.
The screen goes black to 10 seconds and then a blue screen with white writing appears for half a second and then disappears.
The computer then restarts and does the same thing over and over.
ARGHHH! Any ideas.........? Thanks for your help.