I have asked a similar question to this years ago and never really got an answer.
Is there any way to take the Turkey Shoot multiplayer mission that is present in KM and add it into a 1.1 install of the game? I have tried just copying the "Mission4" folder (In scripts\Multiplayer\Episode) into my 1.1 install. That makes the new mission show up in the multiplayer host menu, but it is Uu-clickable and says "Mission4" instead of "Turkey Shoot".
What else do I need to do to enable this mission? Any help would be appreciated.