Thanks, Tacit, Bob. The image is for the computers at work, which have to have the NYC Dept. of Ed. logo on the desktop and the programs the city has bought that come pre-installed when schools buy computers but I don't want all the documents the kids and teachers have created. So I think I'll back up all the documents, delete them, and then use either carbon copy cloner or the free super duper.
I remember that with OS ( use just needed a system folder to start up the computer but this is a little different.
Thanks, again.
Dan