loading movies within movies

[kiwir0b]

I'm designing a website which is navigated by flash buttons on the top of the page. My problem is that I want to keep the interface (buttons) on every page of the site without having to reload them. How can I do this and load the page content (which is another flash movie) of every page below the interface. So in other words I have my animated buttons at the top of the page, you click on any of them, a preloader appears in the middle of the screen loading the specific page keeping the interface in view at the top not having to reload it. Another reason I want to do this is to keep a sound loop playing without it being reset to the start of the loop when changing pages.

Any help would be appreciated.

[SJT Moved to actionscript]