It depends what you want. If you want to just spawn bots like in the mod, the actor that'll spawn them is a regular playerstart. I don't think that's supported though.
You can try adding them to your map as pawns, but I don't know what they are going to do then. You can try it and post your results here.
The actors you want are under Actor Browser -> Pawn -> UnrealPawn -> KFPawn