
Edit pchardwareconfig.ini in the installation folder to set the resolution. Replace the ABAAAA3F value with 0000A03F for 5:4 resolutions, 0000C83F for 25:16 resolutions, CDCCCC3F for 16:10 resolutions, 5555D53F for 15:9 resolutions, 398EE33F for 16:9 resolutions, 26B41740 for 21:9 resolutions. Press Ctrl+ F and search for ABAAAA3F0000403F.
Replace the 0000C03F value with CDCCCC3F for 5:4 resolutions, CDCCAC3F for 25:16 resolutions, ABAAAA3F for 16:10 resolutions, 0000A83F for 15:9 resolutions, 0000A03F for 16:9 resolutions, 1111713F for 21:9 resolutions.
Replace the CDCC4C3F value with 0000553F for 5:4 resolutions, 66163A3F for 25:16 resolutions, 8AE3383F for 16:10 resolutions, 6166363F for 15:9 resolutions, EEEE2E3F for 16:9 resolutions, 88681A3F for 21:9 resolutions.Open RaceDriver.exe with a hex editor such as HxD.