I'm creating doors and triggers for my game that has a 3D model of a hotel that came from a tutorial on creating the hotel using MED. For regular swinging doors instead of sliding doors, do I have to create left-hinged and right-hinged doors? If you're in the way of a swinging door, the door is supposed to hit you. How can I simulate this? Since I have to make copies of doors and triggers for each hotel room, what's the best way of copying and pasting doors and triggers?

I created one trigger for double closet doors. All three objects have same trigger number. When I open the doors first time, both doors open as they should. After that, only one door opens and closes. How can I fix the problem?