UberSoldier

The config tool and in-game options can only detect 4:3 & 5:4 resolutions.

Solution for widescreen (found on the CDV forum: http://www.cdv-forum.com/cdvboard/english/archive/index.php?t-53273.html)
1) Open C:\Program Files\UberSoldier\Run\config.ini with Notepad and look for: r_resolution
2) You must apply the following formula to your desired resolution: r_resolution = height*65536+width
Example for 1680x1050: 1050*65536+1680 = 68814480
3) Enter the resulting number as the new r_resolution value. So for 1680x1050 the line should read:
Code:
r_resolution 68814480

Additionnally, you can correct the position of your avatar's hands/weapons with the cl_hudfov setting. Use one of these values:
Code:
cl_hudfov 0.5 //Default (4:3)
cl_hudfov 0.6 //For 16:10
cl_hudfov 0.65 //For 16:9

The FOV and Aspect Ratio can only be changed via Hexedit:
FOV: Go to the Folder -> ...\Run\platforms\SSE2\XTend3D.dll
Go to Offset 225860 look for 61 0B B6 3B and change it to 61 0B E6 3B or higher.
Aspect Ratio: Go to the Folder -> ...\Run\platforms\SSE2\XTend3D.dll
Go to Offset FC70 look for AB AA AA 3F and change it to CD CC CC 3F (16:10) or 39 8E E3 3F (16:9)