WARP is a high speed, fully conformant software rasterizer. It is a component of the DirectX graphics technology that was introduced by the Direct3D 11 runtime. The Direct3D 11 runtime is installed on Windows 7, Windows Server 2008 R2, and Windows Vista with the [KB971644] update. Windows 8, Windows Server 2012, and Windows RT include the Direct3D 11.1 runtime, which has an updated version of WARP.

Copy d3d10warp.dll from SYSTEM32 to the game directory. Rename it to d3d10ref.dll.

The game wil use Warp10 ONLY if it can use the D3D Reference Rasterizer.

The above instructions will allow you to run D3D10/11 on Vista/7/2008.