Create a new movie clip and call it
timer.
Only 4 keyframes with only actions on them.
1-> stop ();
2-> start = getTimer();
3-> run = getTimer();
if (Number((run-start))>Number(value)) {
gotoAndStop(1);
tellTarget ("../"

{
play();
}
}
4-> gotoAndPlay(3);
Now back in your main movie, from the library - CTRL L -, drag the timer clip on stage, doesn't matter where, it's invisible.
Add a keyframe in your action layer if you have one, where you want the movie to pause.
Set the following actions on this new keyframe:
stop ();
tellTarget ("/timer"

{
value = "5000";
gotoAndPlay (2);
}
This should pause your main movie for 5 seconds. Change the value of value to make a longer or shorter pause.
10,000 would make it a 10 seconds pause!
If you want more pauses, just set up new keyframes in your main movie and call up the timer in the same way as above.
;-)