What clients are they running? XP, VIsta 7? I would suggest using drive image xml. It's a tiny free program that can be easily implemented by setting up a backup job as a task on the first computer, you can export the job to an xml file and imort that job to the rest of the clients. You could create a image share on another computer or server to copy the images to. Have a look at this link.
http://www.runtime.org/driveimage-xml.htmI use it for backing up my home computer and haven't had any issues in restoring. Try it on a couple of clients and see how you get on
Good luck
Roger
