To test the overclockability of my CPU, I would like to run Prime 95 and Unreal Tournament for a couple of hours simultaneously, and maybe I'll even throw in some MP3 encoding. 🙂 Although this is one of my favourite games, I would prefer to run it without having to control one of the characters in the game for hours and hours. I know that other people use this game also to test the stability of their system, by running loops of this game so that it's in some kind of "demo mode" -- how do they do this?