Have you tried pushing the games to play at 1280*1024
and are there any settings in the game to stretch...
TRY THIS IN THE SETTINGS
I DO APOLGIZE, I USE ATI SO I CAN'T GUIDE YOU TO THE CORRECT MENU BUT JUST LOCATE THE ADVANCE DISPLAY SETTINGS IN YOUR NVIDIA CONTROL PANEL
As far as I know, that can be set in
drivers. At least in my NVIDIA
drivers, under "Adjust desktop size and position" there is a choice:
"2. When using a resolution lower than my display's native resolution
* Use NVIDIA scaling
* Use NVIDIA scaling with fixed-aspect ratio
* Use my display's built-in scaling
* Do not scale"
If this is set to "do not scale" or to "use my display's built in scaling" and your display, well, doesn't do it, then you get exactly what you describe.
As far as I know, this issue is in no way related to Shattered Horizon game code.