I have the Steam version of Ghost Recon and am having some issues running mods, like War of Infamy.
Please see our basic guide to installing Ghost Recon Mods on Steam before attempting this fix.
This is due to the folder structure used by Steam. It an be corrected by changing the registry setting as follows...
Here's the AppPath registry entry info:
Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\App Paths\GhostRecon.exe
Subkey: Path
Subkey type: String
Value: C:\Program Files\Steam\steamapps\common\ghost recon\