Yes, I run a widescreen on my laptop. Dell's 17 Ultra Wide. It's outstanding! I run at 1920x1200, both desktop and in game. The fix is using the direct display edit. You can find the link on the wiki community manual (here's the direct link)
http://www.communitymanuals.com/shii...lay_Resolution
Make sure you follow the instructions ALL the way through. The first time I was in a hurry and just did the first part, not bothering to read the whole thing (you need to do more if you are running XP) and of course it didn't work until I went back and re-read.
The start up screens and menus are still in their native resolution, but as soon as the game loads it will load in what ever resolution you define in the CFG file.