If the guy imaged your hard drive with Norton Ghost, I would think you will need to have the floppy disk to boot into DOS and the norton restore program. click here .
Check the CD's to see what you have got. You may need to buy yourself a copy of norton ghost to beable to retsore those images.
if not, a complete restore with your recovery disks.
£200 is way over the top for imaging a disk. Couple of years ago, I paid someone £80 including the new hard drive.