Dynamically loaded external .swf's with loadMovie();

i have a button that when pressed passes a variable:

_root.movieToLoad = “testAni”;

then the next movie clip thet “receives” the variables needs to play the external .swf in an empty movie clip… i have the code like so:

movieToLoad = eval(“external_” + _root.movieToLoad + “.swf”);
emptyMovie_mc.loadMovie(" + VARIABLE_GOES_HERE + ", “_self”, “GET”);

of course it doesn’t work… how do i place a variable in that loadMovie?

thank you so much in advance!
-cam