right click on a clear spot of your desktop,click on properties.this will bring you to the windows vga settings.click on settings and set your resolution to 1024x768.click on apply.and voila.you have a different resolution.just try it this way ok.forget about the registry.not necessary.oh ya,when asked if you want to keep this setting,click ok.
EVGA VF4 SLI MB
2 7800GT'S IN SLI MODE
2X1GIG DDR400 MEMORY IN DC MODE
I'm not too sure, but I thought one of the linux OS can change the display resolution through registry (in Dos mode like, not in side the OS window). I have no idea how u do it though, I have seen a guy did it in dos mode to chage the display resolution setting. He typed a very long line of command to change something in dos, coz the resolution was too high in linux window so it doesn't display though the screen. That's all i know, not much help really....