well try this:
1. Go to whereever your animation is for introducing the content to the stage
2. On the last frame of the animation place a
stop();
3. Create another animation on the frames after the "introduction-animation" which scrolls the stuff off the stage or however you want it to be
4. On the last frame of the animation you place the following script:[as]_root.movieclipwithcontent.loadMovie(_root.buttonc licked+".swf");
5. Then put use this script when one of the menubuttons is clicked:
ActionScript Code:
menuButton.onRelease = function(){
_root.buttonclicked = "furniture";
// for the art-button the value needs to be "art", etc...
movieclipwithanimation.play();
// of course "movieclipwithanimation" needs to be replace with the proper name
}
That's basically all you need...though there's some stuff you need to figure out yourself (like folder-/filenames which I don't know since you haven't given that much of details

)
You should be able to help yourself from here, though if you get stuck don't be shy to ask

- Ruben