Intro and Outro

I have flash movie that I’m loading other movieclips and swfs into.
At the moment when I load in a new swf, the timeline plays through the intro sequence, then when I select new content to load in to replace it the movie simply vanishes without showing the outro sequence.
It’s been puzzling me for a while now but i’ve seen it used on many flash sites so i’m guessing there’s definately a way to do it.

Please share your ideas or point me in the right direction of a tutorial.
If there are different ways to do this, which is the a more efficient?

Thanks