Loading External SWFs

Alright, so I’m making a flash website. My content is a bunch of my animations, and in my new version of my website I want to have them load directly into the site inside a little viewing screen, I’m starting out simple.

I have this movie clip, named Happy_Screen, and on the frame is the action
stop();
loadMovie(“Movie.swf”,Happy_Screen);

It loads the movie just fine, but with the wrong dimensions and way off center. How can I control where and how large the external SWF loads?