I found a solution, but it’s not fantastic.
In Postal2.ini (it’s right near exe file) change the following (semicolons):
[Engine.Engine]
RenderDevice=D3DDrv.D3DRenderDevice
;RenderDevice=Engine.NullRenderDevice
:RenderDevice=OpenGLDrv.OpenGLRenderDevice
to
[Engine.Engine]
;RenderDevice=D3DDrv.D3DRenderDevice
;RenderDevice=Engine.NullRenderDevice
RenderDevice=OpenGLDrv.OpenGLRenderDevice
Basically instead of using DirectX, the game will now use OpenGL.
It works on external GPU, 60 FPS
Now please stop changing the subject and dily-dallying around on me and tell me how I CAN import it and test it myself in VorpX