Hey kickloch, thanks for the tips, you are right it DOES work. I did some more testing using OSSC, which displays the actual refresh rate, and after running mgamon and setting 1024 768 @60, (which creates the inf file) it does adjust the vertical refresh down from 85hz to around 75hz.
- it doesn't work through my monitor's vga port. Only using OSSC on the DVI port, and only with 'Allow TVP HPLL2x' enabled could it get a picture. Also, picture quality is improved with 'Allow upsample2x' enabled.
- the game starts on a corrupted screen if my pci sound card drivers are loaded (SB Live sound card), so no sound in msi mode for me
- fewer lines are displayed, presumably because of the lower refresh rate, some of the top and right of the picture were lost, not a disaster though, still playable (see screenshot), looks like it's missing 25 lines according to the OSSC
- looks like the 'MGA' environment variable needs to be set so that the dos msi program can find the mga.inf settings file created by mgamon. The matrox dosutils installer adds that path to autoexec.bat
- vbetsr and vbesetup are not necessary.