Forcing an external swf to load into a parent

I have created a parent swf that holds thumbnails in a scroll box, when a thumbnail is clicked i have created a movie clip instance of it to load the persons portfolio into the parent swf. The problem is when the portfolio loads it does not retain its parents dimensions so whatever graphics i have in the parent dissapear when the portfolio loads and it resizes the swf to the portfolios dimensions rather than the parents. here is the actionscript i have assigned to the button when clicked.
on (release) {
gotoAndStop(“Scene 1”, “aidanport”);