From source: Sonicscoop
Cool. What about the fact that Breaking Dawn is a two-parter? Knowing you’re also going to be scoring Part II, does where the story goes from here enter into the picture at all for you? When you’re thinking of these themes?
Well, I’ve read the script, but I haven’t seen any of Part II yet. But I did have to write a theme that Edward plays on camera in Part II. Bill wanted to echo the “Bella’s Lullaby” scene from the first Twilight in the last part, and so I had to write a lullaby for that well in advance so Rob Pattinson could learn the fingering – he’s a musician and prides himself on being able to do that.
Read more here