Stage Resize and Full Browser Flash sites

Hello

I am trying to acheive a full browser flash website effect like the one in this website.

Now I now how to scale the background when the browser size changes to fit the browser. I can’t seem to figure out how many movie contents would be adjusted when browser is resized.

I am making a completey dynamic website whose contents are loaded from an XML file and after loading I want to display them on stage in a way that whenever the stage size changes they maintain thier positions accordingly.

I have two sprites one to hold top navigation and one to hold left side navigation and then a third container sprite that hold the contents of the button being clicked by user.
If you want I can give you my design template just to give a better idea of what I am displaying.

I have had this problem for quite some time and I would really appreciate any help

Kind regards
Adnan