Is it possible to get a Mac to display 320x240 resolution either on an LCD or out of an S-Video cable? The main use of this would be for games, so that if a game were supposed to be displayed at 320x240 it would not need to be scaled.
Have you tried CSCREEN? I know it can work to make the screen resolution 640x480 in 256 colours but you give it a try. (You can do a google search for it CSCREEN OSX DOWNLOAD, etc...)