Navigate to the following path based on your Windows version:
You can find the fix on major widescreen gaming databases.
: HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\WOW6432Node\Pivotal\Conflict Global\Device Settings .
ConflictGlobalStorm.exe
This is the hex code for 640x480 (Width: 0x280 = 640, Height: 0x1E0 = 480).