-Get the Latest Video Drivers from ATI
-Put the game in 98/Me Compatibility mode and disable Visual Themes and Desktop Composition.
-Radeon 9800 is pretty Ancient as far as Video Cards go, you might want to consider upgrading. (Either Vid Card or the Whole System. Though System upgrade would definitely get you more mileage, I also realize it may not be feasible depending on your situation.)
Only other thing I can think of is to check the Registry to make sure the location you’re instaslling to matches the location the Registry is looking for the game. Warning !!! Messing with the registry is NOT recommended for inexperienced users.
Running in 16-bit color
Check another system to see if the CD is the problem
Update codec files (could be the movie that is causing the problem)
Update sound drivers (yes…these need to be updated too, just like video drivers)