My first tutorial is based on first problem when you want to create papervision and movieClip mixed project. In this case you want to use papervision inside a movieClip and you can put a mask for hide the border. and add text above and below.
Then first,
you have to create new MovieClip (Ctrl+F8). and give him some linkage (Right Click on it on Library->Propertie->advanced) to your code file (as file, here "_3DScene").
like that :
Now create a new classe file and code your 3D project like normaly ;-)
just this classe drawing 3D have to be extends Sprite.
here you can find a complete and simple example :