I guess a student- maybe myself if i could get my voice deep enough - could speak the parts, although it would not be as effective to the show because in the prerecorded dialogues there is panning, echoes, and distortion (I think a lot of people might have thought of that as a techincal problem) which could obviously not be done while the student is speaking. This will deffinitely be an issue.
By the way, what did you think of the fact that we were one of the only bands that did some slow-marching?