I want to be able to start GalCiv2 in window-mode (this only I can do easily with the w flag as argument to the exe) using a different resolution than default. Sometimes I want fullscreen and sometimes I want to play in a window with the taskbar visible which should be possible as long as x > 1024 and y > 768 (I have a 1280x960 desktop). But since I want the full size in fullscreen mode (1280x960) I want to be able to say that I should use a lower resolution in window mode (1158x864). For this I want a switch, to tell the program that I want another size than default. Is this possible, and in this case, how do I do it?
PS. Why can't I choose any size of the game I want when I'm in window mode?