When editing the config files to remove things like motion blur, the game will put these settings back to default if you don't disable the launcher in Origin.
however, do not delete the moha_setup.exe as advised in this wiki or else Origin gets confused when launching. simply use the no launcher parameter in origin game settings. Also use the drop down in the origin game settings to tell origin to launch airborne and not the airborne setup.
now if only I can figure out how to disable the head bobbing..