Baseline (Widescreen) Solution & Issues
16:10 resolutions are supported natively. In the video options screen, select your resolution. 16:9 resolutions are not available.
Resolution data appears to be stored in this file:
DataCfg_14_12_2005.dct
But it's not very readable to human eyes. Furthermore, *this* file appears to exist to make sure you haven't been monkeying around with that file
DataCfg_14_12_2005.dct.md5sums
So I have no idea how you would make non-native resolutions work.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
No support for surround resolutions.
4k UHD Specific Solution & Issues