Firstly, learn scripted cameras - it's worth it. It's not hard. Start with snYpir's tutorial and then read messiah's - you need to read both of them.
Secondly, I undestand that before you do that you want your mission to work with at least a basic cutscene.
Thirdly, as a general point you shouldn't use triggers to set off triggers. If a whole bunch of things are supposed to happen when a trigger is fired, then they should all be linked to that trigger in some way.
Fourthly (at last) I'll answer your question directly. Delete the second trigger. Your first trigger should look like this
Activation: as you like, player present or whatever
On activation: cutscene=true
Now, you seem to have a gamelogic going through a sequence of waypoints to make the cutscene happen. That's fine. In the first one put this:-
Condition: cutscene
The GL will stop at that waypoint until the variable cutscene is set to true by the trigger.
Alternatively, make the trigger type switch and synch it with the GL waypoint. Then you don't need the variable.
Hope that helps.