Did your 9600 require you to install DX9 first? My 9800 Pro did, and also the ATI Cat. 3.7 drivers are out. I have WinXP Home and haven't had any problems playing EAW or OP, or using any of the Mods. Try loading DX9 first and then the Cat 3.7's. They are available as a complete file, which includes the Smartgart uninstaller, which you shouldn't have to use. Last thing, try installing the new Motherboard drivers, if available, before DX9 and Cat 3.7. Lastly, check your bios settings.
DIF_Wraith 413