Nevermind: solved. I'm guessing my attempts to use regedit worked better than I thought they did: upon rebooting, winecfg ran fine and was set to winxp, just as I had told regedit to do. weird.
Nevermind: solved. I'm guessing my attempts to use regedit worked better than I thought they did: upon rebooting, winecfg ran fine and was set to winxp, just as I had told regedit to do. weird.