Fuggles meant you can edit the settings by hand in those .ini files. If you are unsure simply do the graphic adjustments in the game menu instead.
The game itself should use the best device anyway no matter what the Graphicsconfig.exe is saying to you. I advise you ignore that. Its quite possible this exe is far outdated and haven't got an update since the game got out, thus won't work as intened anyway, just think about how old DoW DC is
I see. How do I do that?