Norton Ghost 14

I just purchased this product. I was able to install, make recovery CD and backup the Dell C521 PC on an external drive iomega 500G NTFS drive. It didn't take long to make the backup image. I have two other computers, and I'm thinking of getting them both each a Norton Ghost 14 for recovery backup. All three computers have relatively small hard drives of 80G. The image may only take 8 to 10 G. My kids use the computers. I can buy another two Nortons.

 

I want to know if I could use only one external 500G NTFS iomega to store the backup for the three computers? What things should I be concerned about if I use only one external for storage of their backup?

 

I want to use Norton 14 as a PC restore. The computers are XP and I would hate to reload the operating system , all the programs and download all the Microsoft updates if something happened to the hard drives.

 

 

Thanks