This is a graphics adapter problem. I have experienced it over many years. For a long time NVIDIA was the only manufacturer which continued to support this 'unusual' video mode but now it seems that even they have dropped it!
Only workarounds I have found are:
Find an older NVIDIA graphics card which fits your system
Use an old PC with a graphics card which still works
Use DOSBOX which emulates the mode properly, but is grindingly slow ...
The latter is the only working option I have found with VISTA.
Hope this helps!
I'd rather be skiing in Tuscany!