I don't know if this was addressed already... but you don't want to try XP unless you have at least 64 MB of RAM. Even then, it is very slow - also MS recommends 300MHz processor or better. W2K might be a better option for older systems.
(hide) Play a game in real time with an online opponent! For this to be possible, you and your opponent have to select the action "Move and stay here" as default and then reload the page with the F5 key! (TeamBundy) (show all tips)