Good advice from everyone, Thanks
Just for the heck of it, I gave it a try.
Was anticipatiing XP would give me a chance to designate a drive letter other than C: but it it did not.
Long story short, I ended up with a nasty blue screen.
Hit the reset button, restarted in safe mode, and did a system restore from the most recent restore point.
Back in bussiness, and lesson learned.