Flash background image/mc, resize to browser window

[Lovelybones]

Hey Guys,

I was wondering how I can resize the background image or MC to fit the browser window - but the content stays the same size?

Something like this:

http://www.dollhouse.com/#

(but I don't want the content to move around with the window though when you resize - But if you know any good tutorials on how to do that it'd be cool!)

Or something like this:

http://www.neworder.cc/

Any suggestions folks?

Max