Transparency is retained when using .apng. I'm using that for the intro on one of my series, but there is no way to add sound with out doing what NationalSolo suggested. He said something about saving the video separate.
Borate had the idea of saving the file and just importing. I just tried that. I'm not really editing that video yet, but I started it. It creates a second story board which took me 2 seconds, I just have to remember that this will always have to be the very first thing I do, or I will have to reformat the intro every time and that is the kind of frustration I want t