Since you have restored old ghost image after the update so your only immediate SOS may be below:
1. Open boot.ini for edit
2. Copy and paste as new the line multi(0)disk(0)rdisk(0)partition(1)\WINDOW="Microsoft Windows XP .........
3. Increment the partition(n) by one like partition(2) on the new pasted line.
4. Change the string "Microsoft Windows XP Professional" to Whatever you like
5. Save and reboot.
If Ghost have done other things the above may not work. Then you may need to re-install Vista again
Good Luck