Zirael, you could also try modified chipset drivers, specifically the nforoce drivers. In your case, this "Special MCP65-67 nForce Driverpacks for Win7/Vista" might help. I can't guarantee the results, but if the system doesn't boot after installation, press F8 during startup and select the last successful configuration. In dxdiag, you could try disabling AGP texture acceleration in the display tab, just to test, but I think this option was removed in Windows 7. You could also try setting the desktop resolution to 1024x768 before launching the game, as it might use this resolution on the first start, although it seems unlikely.