Will the Sysprep tool do this or just put me in a workgroup? What does "Some user setings may be altered" mean? I am going to read up on the Sysprep tool.
I found a way to do this. Get Microsoft's Sysprep tool. Run it - select 'reseal' and mini setup and let it reboot the computer. During the mini-setup that then runs - put the computer into a workgroup of your choosing. When you are done - all the software you have is still there (and drivers and patches). Some user setings may be altered - but it is better than reloading everything.