loading external movie problems

hey there

would someone beable to help me with this problem

I have a main movie, within this movie are two buttons button1 +2. when you press button 1 it loads in and external movie called load.swf, this movie(load.swf)also loads in small external movies(movie_02 + _03).

button 2
this loads in movie(who.swf)

the problem I have is when I press button 2 I need the external movie 'load.swf) to unload but because the actionscript is on the external(load.swf) movie I think my code for button 2 is wrong and I'm not sure what to do?

I think I have to tell button 2 to read out of main movie to the movie load.swf, then from in there go to 'graphics'(movie within load.swf)and play out the exit anim???? AArrrrrgghhh!

this is what I have on button 2

on (release){
if (_root.graphics._currentframe == 27) {
play();
}
initMovieLoad('who.swf');
}

is it here I need to change code vv?

if (_root.graphics._currentframe == 27) {

attached are the example files

any help would be greatly appreciated!!