So me2621a, are you good with Doom 3?
Here's the method for Call Of Duty Single Player:
1. Patch Call Of Duty to version 1.5 (Not necessary. Just a good idea.)
2. Use WordPad to open this file "config.cfg". The default location of this file is "C:Program FilesCall of DutyMain".
3. Find these five lines and change them to the following exactly:
a. seta cg_fov "90.395093"
b. seta r_mode "-1"
c. seta r_customheight "900"
d. seta r_customwidth "1440"
e. seta com_introplayed "1"
4. Click on File>Save
5. Close WordPad
6. Start Call Of Duty Single Player and everything should display properly.
The fifth line change is optional. Without it, you'll see a blank screen while the Activision and Infinity Ward Intros play. "1" stops them from playing all together.
There is also a separate file for Call of Duty Multiplayer called "config_mp.cfg". It is located in the same directory. You can make the same changes in that file to change the resolution. Unfortunately, the FOV change doesn't stick. It always reverts to the default "80". You will fill your screen side to side, but the game world will be stretched.
What would I set the FOV to for 1920X1200?