Perhaps you had the problem, that when you do NPCs(Nor-Playable-Charakters) on you map later, ingame they kill each other.
Ive found the sollution.
You just have to go on: "Actorclass-Properties/Al/TEAMINDEX"
There should be insert a "5". You hav to change of on NÜC this "5" to "4" or "3".
Then all the NPCs just fire on you.