To maximize performance:
Control Panel>System>Visual effects>Custom or Adjust for Best Performance...Custom if you would some control even if you choose to click none.
After installing your game, select on your exe possible compatibility mode 98" and no visual themes and try to run. If no success then uninstall all components. Try again.
This time select on your installation disk, don't let it autoinstall. Select run program in Win 98 compatibility mode with no visual theme enabled. Could work? I don't know.
Other settings you may consider: Right click on desktop>properties>appearance> Buttons=classic, scheme=classic...only if you are willing to give up the stream lined nature and colorful presentation of XP, which often just decides it's not right for me anyway.
I am uncertain if this will answer your question but maximizing for performance seems to be working great...so far, faster than ever. But please be cautious. I don't want you to be angry for any ill advice I might be giving regarding your computer.