Using Ghost 10 and cloning?

I had the older version of Ghost and did not know if I should go to the Ghost 10 product. My plan is to create complete “ghosts” of my 20 systems so if a hard drive fails, I don’t have to reload each system.

With Symantec activiation, does this mean I would have to buy 20 versions of Ghost 10 or can I just use my older version as everything is in dos anyways?

If I were to buy Ghost 10 (or the older version) what is the best way to accomplish this and should I burn the backups to CD’s, DVD’s or another master drive.

Any feedback would be helpful..