Medal of Honor: Allied Assault No Hud

==1.==
Enable cheats. On the main menu, go to Options, Advanced, and make sure 'Console' is checked with a red X. 
==2.==
While in a mission, press the " ` " key to open the console. Type: "ui_hud 0" without quotes, and hit enter-- the HUD should now be gone. Type "ui_hud 1" to re-enable.