Trailer Song Question

I know that there've been many song questions about this spectacular film, the answer to most of which is either "Mazzy Star" or "Peter Sallet", but I've a different question.

In the trailer, at the very beginning, an instrumental plays that I think is just gorgeous. I'm talking the very beginning when the moon is over the hills and Harlan is waking up beneath the bridge...

Anyone know that song? Where I can find it?

Also, the song that begins right after Tobe says "...what starts it?" when she is on the highway overpass. The name of that one too?

I'd be so appreciative if anyone could answer these questions! They're killing me!

This is the particular trailer I am talking about:

http://www.youtube.com/watch?v=Wy6amXpVPYw