I have "maintain aspect ratio" checked in Catalyst Control Panel. The thing is the game keeps opening the 640-480 resolution in 16:9 aspect ratio. Does anyone know how to make it open on a 4:3 screen? I remember I was able to do it on my old ATI card.

EDIT: I found out that I have to use the dvi connection to enable black bars on the side of the screen to maintain aspect ratio. So I simply made my 21" crt monitor the main monitor before I started the game and everything looks beautiful now. :)