Thanks for the info. ....... I don't think Virtualization is worth it, given that it can't duplicate my current setup yet takes so much space. I don't like Eaz-Fix too much because of its lingering processes and restriction of disk defragmentation. ........ I'm starting to settle on a scenario... 1) For installation testing, I'll use ShadowUser since its quick and allows for frozen-session reboots. 2) For dependable backup, I'll buy a jumbo external hard drive & use imaging software. ........ Thanks to all the posters. On my own, I would not have learned so much. Your suggestions have introduced me to interesting software and new concepts...within a short amount of time. I think I have a good base understanding now. I can build on that by experimenting. I'll still read responses and consider new posts if necessary. But essentially, this problem is solved.