Check Here first. Some of them already support widescreen.
Crysis does natively. And we've got fixes for surround support too. Not sure what else you need.
http://www.widescreengamingforum.com/wiki/index.php/Essential_Games_List
Thanks for replying skeeder but did you read my first post? What I'm asking is to be able to play at 1024x768 (native res of my plasma) but with a corrected horizontal FOV. As I said, some games offer this aspect ratio correction for rectangular pixels (CoD4 or Prince of Persia, for example) but the ones I posted, although they offer proper widescreen support, lack that option.
Out of those four, the only one that needs adjusted is Gears of War, and you can adjust that via the console.
I know this may sound confusing but I'm not asking for a proper widescreen support of the games I posted because I know they already support it, I want a hack to be able to gain horizontal FOV in those games while playing at 1024x768 so I get an unstretched picture.
We are talking about rectangular pixels not square ones.