@ray: That would probably actually be the best solution - the sound quality of those files is awful, they use the SE soundtrack and they aren't very well edited - there are these distracting volume jumps every time the narration starts and ends.

@Nick66: The script would be the same, plus I don't think anyone really cares to preserve these particular narration tracks made for the 2004DVDs (plus they are preserved in those files) - it's just about having the option of the narrative track.