Preloading external swfs to emptyMovieClip

Ok ya’ll, I am totally stuck here. Once I get this, I should have no problem completing this site.

First of all, check out my site at From here, you will notice that I have five buttons, which link to various content. Each of these buttons load their respective external swf. The only problem is that I want to be able to preload these. I have the preloader built which is another mc and I only want it to show and run, when each button is clicked.

Now, I’ve read up fiercely on the movieClipLoader class and am still having problems. For those of you that have done this before, I would love your input.