I believe yes, unless you are summoning something out of the list that I mentioned earlier. Ouch. Did you have Revolutions enabled? Do you know whether that guy was there at the beginning? Thanks for the report. I don't know how to fix this, it seems that the registry entry that the installer uses to find the Civ4 directory is not present. Please try the zip version in the future. Did anybody successfully used the installer with the steam version?