ok - As soon as trymedia teels me I'm safe uninstalling Civ4, I will give that a shot. Earlier, I had a problem with BtS being unable to recognize the version of Civ because trymedia's version was listed in the registry as 1.74.0000 instead of 1.74 or whatever. So I know to fix that right off the bat after I reinstall Civ4. Other than that... do you recommend I fully patch Civ4 before reinstalling BtS, or should I install both, then try to patch them?