Honestly I don't know if that's what it's called... They call it Nausicaa Requiem - but whenever I try to find the sheet music for it, it doesn't sound how I want it to. Days Long Gone sounds closer to what I want, but even then I think it's a bit different than this specific arrangement.
I want this SPECIFIC arrangement of the song I'm talking about.

http://www.youtube.com/watch?v=1kArSVEwbhw

If you go to 34:33, the song starts, and it ends at around 38:40. I can't find that arrangement of the song ANYWHERE. If someone could transcribe it, or at least find the sheet music that exact arrangement somewhere, I'd love you forever. >_<