I've been trying to get UT2004 to use OpenGL as I've found my D3D performance to be quite average; in the UT2004.ini I've changed "RenderDevice" from "D3DDrv.D3DRenderDevice" to "OpenGLDrv.OpenGLRenderDevice" but I get this message from UT'04 quickly after launching
"OpenGL Engine General protection fault! History: UOpenGLRenderDevice::SetRes <- UWindowsViewport::TryRenderDevice <- UWindowsViewport::OpenWindow <- UGameEngine::Init <- InitEngine <- FMallocWindows::Free"
Thanks.