Back in the day I was running GLTron on an Athlon 1800+ w/Nvidia GeForce FX 5200 (I think?) and I was running dual monitors. GLTron didn’t like using both screens since it presented as a peculiar resolution. So I emailed the GLTron dude and he quickly emailed me a patch that let me run the game across both monitors (bezels not an issue because I was doing multiplayer split screen).