Question about triggering cinemas

Sorry if this is in the wrong part of the forum but the newer layout confused me... any ways i want to trigger a cinema half way through the game, and the best way i knew was by have a unit enter a region event. So i thought it would work but when the cinema first triggered the units following the first triggered it again and again so it started over and over before got a chance to the turn off trigger part of the trigger, so it wouldn't trigger nagain.

If you don't understand sorry but if you have nay ideas tell me please, or if you have a better idea for a event to trigger a cinema half way through, and then be turned off right away so it can't be triggered again.

Also is you played the first NE mission of The frozen throne where you see Illidain escape on a boat... does any one know how to get those cool looking night elf style piers... because they aren't there on the doodads layer with the other pier with two lanterns at the end.. I just don't see those typ[e of piers any where.

Yeh, it's pretty hard to tell, since this forum is named "Site Discussion" which has been it's name for over 2 years..... moved.

Put your "Turn off (This Trigger)" action as the very first action of the trigger. Don't worry, the rest of the actions will still execute that 1 time.