You might have to just upgrade your drivers.
I got a weird message after installing the ES (and playing it once, wihch was weird) saying something about my graphics card and suggested upgrading the drivers. Doing a google search for "Ati Rage Pro" yielded this site:
Ati.com which I imagine is the home site of ATI.
If you go to the Drivers and Software tab you can find driver updates by OS. Try doing that and see what the game says.
If not... well graphics cards can get pricey...and if your current card is integrated into the motherboard(like mine), I believe it's very difficult to upgrage, and expensive, if it's possible at all. Zoohio really seems to know what he's talking about in such matters...he might have something more to impart.
Also: my game was much faster w/out the ES. And I know its related to the graphics card. Go figure :rolleyes