There is an edition of the recording sessions?

There is a 3 cd set here, if you are interested:

The Chronicles Of Narnia: Prince Caspian Soundtrack (Complete by Harry Gregson-Williams) | Download Soundtracks (http://ma-g.com/movie_saundtracks/the-chronicles-of-narnia-prince-caspian-soundtrack-complete-by-harry-gregson-williams/)

I have not heard it yet, so I know little about it.

i really like both that and the narnia 1 extended soundtrack. (also available on that site, by clicking the narnia tag, and then one of the results). i'm also looking for them in flac, but ive never found them