Well, you end your mission with making a trigger of End1.
Make a trigger, and in the "edit trigger" screen, there is somewhere a tab which contains End1, End2, End3, End4 .... Switch, And more ... So select End1, activate the trigger as you want, and the intro will end.
Also, I suggest you learn camera scripting, it ain't hard. If you know it, you could make your own special effects! think of it
LAPD