[CS5, AS3] Fluid website loading external swf

I completed the tutorial at this website: http://active.tutsplus.com/tutorials/web-design/build-a-fluid-website-layout/

Now I am trying to apply this tutorial as well to the site: http://tutorials.flashmymind.com/2009/02/website-with-actionscript-3/

So in a nutshell, its a fluid website with externally loaded swf ‘pages’. I would like to know how to make the menu I add be able to load the external swf. How do I adapt the code?

Thanks soo much for the help!