Detect load(ed)Movie stage dimensions and tell Flash Player?

Here’s one for you Flashers.

See this site:
http://www.webbersurfboards.com/deploy/swf/shell.html

Anyone know how he is getting the load(ed)Movie to increase the size of the Flash Player in the browser, thereby being able to load different size swfs using ‘loadMovie’…so the div it sits in allows a browser scroll when it’s needed (and a table below with the html copyright.

Has anyone done this before, or know where I can find a tutorial?

Thanks
{Dilution}