I've been looking at the files it seems like offline mod hasn't change since version 1.05 came out! I've personally tried to add a helicopter to spawn in offline mod but it didn't work. I asked a few other players and they all had the same outcome as me....Failure to change or add vehicles in offline mode. I was just trying to make it more interesting kinda like the old arma 2 dayz mod where you could spawn vehicles, aircraft and boats now that was a great mod even if the zombies used to run in circles sometimes.Does anyone know?