In the README it says that if you use:

Video Mode=1152

then the game should run at 1152x768 resolution, however none of teh "Video Mode" options seem to work.

the "KeepRes=1" works fine though...any help to get this thing to run at 1152x768 without changing my desktop (which runs at 1600x1024)?

I could only get the video modes to work if I put the video mode entry at the end of the .ini file, don't now if it helps though, I run the same resolution in the game and the desktop.