I have an old GTX470 driving two monitors, which supports span modes under XP but not under W7, instead requiring borderless windows to span games / video across both screens. Some games however don't support resizable or custom windows - only offering the monitor's standard supported resolutions, just as windows instead of full-screen outputs. The trouble is, the max custom res i can create under Nvidia settings can't exceed the native res! So it's impossible under Nvidia settings to create a 'full-screen' custom res for these games' borderless windows! The monitors are Matrox Tripleheads, 3840x1024 each, so i need to create a custom res of 3840x2048 - NOT to ever try use as an actual screen mode of course; just so that these irksome games will offer it as an available windowed resolution.. I've aleady done this for 'HD' modes - making a custom res of 1920x960 - twice that of either monitor - but it let me, since this was below the '1024' max vertical res of either. For '4k' however - 3840x2048 - Nvida Settings just says "Custom resolution 3840 x 2048 as 60 Hz (32-bit) is not supported by your display." Duh. I KNOW it's not 'supported' and have no intention of trying to switch to it as a screen mode anyway! I ONLY want it so that games will offer it as an available windowed resolution, which CAN span both monitors just fine.. Is there some way to override this limitation - perhaps editing some Nvidia settings manually?