It's pretty easy once you do it a few times. Pumper42 used to do it like that *snaps fingers* Lemmie find a little part of his directions lol. This was for bay doros 1.Place door on map 2.Click on door and select properties tab at bottom 3.Where it says object name remove UNNAMED 4.Put in name gate_fir01 (just change number for additional doors eg: gate_fir05, gate_fire09 etc.) 5.Go to edit and select TRIGGERS 6.Select NEW 7.Give it the name that represents the door eg:gate_fir01 8.Check boxes person squad and vehicle squad 9.Now make a box 10.Place box accordingly (make the width of the door, about as long as a vehicle, and make the boxes extend slightly inside door. This allows for it to open when the truck leaves. Height does not matter as long as nothing is inside the box. eg. light pole 11.That should do it. (OMG IM SO WASTED)