Externally Loaded SWF, Loads New SWF problem

Ive gone through the ‘Transitions Between Externaly Loaded SWF’s’ tutorial here on Kirupa. All of this works great, but now I have a little problem, a few of my externaly loaded movies have buttons on them that when they are clicked I want them to load another external swf in the same way as the main one does in the same original container so it would transition out of the file with the button and into the new file without having to make a new container in the original file. I hope that makes sense, here is my AS for my main buttons:

on (release) {
if (_root.currMovie == undefined) {
_root.currMovie = “artists”;
container.loadMovie(“artists.swf”);
} else if (_root.currMovie != “artists”) {
if (container._currentframe >= container.midframe) {
_root.currMovie = “artists”;
container.play();
}
}
}

here is the url if you want to see what I am trying to do, click on the about button and along the bottom of the loaded file there is a list of buttons, thats where I am having the problem.
http://www.nucklewebdesign.com/moving/main_nav.htm