Need a quick hand here.

I'm loading into my flash an external swf file with the following code.
mcLoader.loadClip("lib/library_boots.swf", mc_Stage.swfBoots);
This swf is a animated swf that I modified it to make a method called callback
so when I load in the swf I can call a method init() to tell it what method of
the parent swf to call when complete.
How do I get an internal swf loaded via "loadClip" to communicate with the
parent clip?