XP Booting problem

I recently had to swap out a mobo in a system in my house. For ease, I decided to do a new install, but there was still needed data on the drive. So, using Ghost, I cloned the orinal 6.4 gig drive to one of my other 40's. Here's where I messed things up though, when I went to install XP, I left the 40 as primary master and the 6.4 as secondary master. XP let me install on the 6.4 so I didn't care. When it boots up it asks me which OS I want to boot, I have 2 options, both are the same "XP Professional ". The first will not work (obviously the 40 gig with the old install thus wrong drivers and such), the second one allows booting to XP. However, this drive I boot off of still comes up in windows as the D drive. What I want to do is take out my 40 and move the 6.4 to primary IDE, but when I do that I get error on boot up saying "NTLDR missing, press Ctrl + Alt + Del to restart ". The drive is there and detecting fine (otherwise I wouldn't be able to boot when the 40 is in there). What can I do?

[edit] Its actually the first boot option that works, not the second.[/edit]

 

I understand that if you Ghost an XP HD to another HD, you must not allow the system to reboot (after cloning) to XP with the both drives connected. XP evidently destroys the cloned HD boot capability?
After Ghost does its thing, I allow the system to boot to a DOS floppy, then turn off the box, and remove the original HD, and move the clone to IDE0 as a master.
Good Luck
Top Dog