Transition thing

I have a container clip that holds main.swf from start.
When I click a button on the stage I Want section1.swf
to appear in the container clip.

But this must happen AFTER section1.swf is finished preloading.
So while section1.swf is preloading the main.swf is still visible.
And a preloding bar is being dispalyed under the container clip.

How Can I create this?

Check out this transition tutorial, it might give you some ideas. If that doesn’t help then run a search in this section for “transitions” because it’s been asked a few times already.

http://www.kirupa.com/developer/mx/preloader_transition.htm