Chaning DDC monitor info in Win XP

This is a tough one but maybe someone can help.

I have an old-school gateway Destination 31" monitor that is mis-reporting its DDC information. I own two of these monitors and their spec'd res from the factory is 800x 600 (60refresh)

One of these monitor's DDC information reports in as 640x480(72 refresh). That was not much of a problem being that I was able to over-ride the DDC info and manually set the res to 800x600. It runs fine using all the basic apps(office/ iexplorer) but when I attempt to run a game:
Silent Hunter 2
IL Stormivik
SimCity 4
Medial of Honor
the games seems to look to the DDC information for its screen resolutions ie: I can't set the game resolutions above 640x480!

I tried disabling all "auto detect" options in windows so I can set the res's and refreshes to the max the video card supports if so inclined without success.

Any advice?

Windows XP (pre-SP1)
Ati Radeon 8500le (128mg)- tried several different drivers including the latest.
Monitor- Gateway Destination DL31-1- tried both the plugnplay driver (which works with my other monitor) and the Gateway driver included with WinXP.