Development of Creative Commons licenses

[Tom Morris <tom AT bbcity.co.uk>]

Hi all,

I'm involved in an audiobooks project, and am trying to take public 
domain texts and turn them in to MP3's. Which is fine, as they are 
public domain. But I recently started doing a book - "Beyond Good and 
Evil" by Nietzsche. I found a public domain translation on Gutenberg. 
In addition, I felt that I wanted an introduction for some of the books 
so I am using articles from Wikipedia.

With regards to Creative Commons material, here's my problem. Say I 
take something that is ShareAlike. I record a version of it in MP3, and 
release it ShareAlike too. That is going to be one file. But what of 
the rest of the audio book? I don't want to use ShareAlike on that - I 
want to dedicate it to the public domain.

So, say we've got Beyond Good and Evil - the book I'm currently 
converting:

Introduction (from Wikipedia) - GFDL.
or an Introduction based on CC materials - ShareAlike.
Rest of the book (in seperate files for each chapter) - PD.

Is that okay?

--
Tom Morris
http://www.bbcity.co.uk