I am generally a big fan of RTFM, and I think this question is answered there somewhere. However, I am hesitant to be quite so rude to newbies with quesions on a Stardock product. Whether as publisher (Sins) or developer (GalCiv2) a common thread runs through the products: great games, incredibly pro-customer attitude, unmatched dedication to continual development and improvement of the game, BUT a high learning curve coupled with terribly incomplete manuals, inadequate tutorials, and unpolished ingame information. I am willing to forgive Stardock much because of the good things (and the probable small size of their budget compared to their quality competitors), but the poor documentation cannot be denied and hinders newbies. They are not exactly Firaxis in presenting polished manuals and ingame documention (Civ 4 took some postrelease patching to the Civolopedia, but is probably the gold standard in this regard).