When you will get that suit it will target a trigger's master! When that master is on the trigger will be able to target the scripted_seqeance that opens the door! If you want the burney to say something if you don't wear the suit you will the trigger will target a scripted_sentence,and forget about that master. The suit will target a trigger_changetarget that changes the trigger's target to that scripted_seaquence that opens the door!
Do you want me to post an example map?