OK, I downloaded Stronghold HD hoping to get a nice view of the field, but 1920x1800 is way too small for my taste. Unfortunately the only other resolutions I see (800x600, 1024x768 and 1600x1200) have a 4:3 aspect ratio. I'm stuck with either playing ants or no widescreen. Is it just me and is there an INI file i could edit. I couldn't find anything.

I run the game with a widescreen resolution of 1680 x 1050 and it looks fine. I have no Idea why you only have these few options. Maybe there are problems with your graphicscard or the driver. :/

Does that happen to be the native resolution of your screen? I tried at my brother's PC and he was only able to choose the native resoltion of his screen and the 4:3 resolution with the same height (and the two old resolutions). in my case I was able to select 1920x1200 and 1600x1200 which have the same height as well.