Actionscript questions

I have a flash-based website that has 2 main mcholders and 5 buttons. When I click a button it opens an external SWF in an mc holder. I want to learn 2 codes.

  1. If I clicked a button and it is loaded on the MC holder, I don’t want the button to be accessible until a new option is in the mcholder.

  2. WHen I click another link I want the first swf to fade out before the new one fades in.

It is for http://www.scarboni.com.

Fla files available if needed.

-Sergio