Simon, yes, in PMPT, Schiller wrote about the British documentary, by Mills and Tracey. Schiller informs about the fact that the Rs agreed to no restrictions during the interview, yet the attorneys come back with restrictions. Alas, the Ramseys prevail, saying that "they would be open to all questions and that their friend, Susan Stine, would do their makeup." It's almost like Schiller is subtly giving some kind of clue to something. He said himself that he had to leave out a good portion of what he knew about the case. And, yes, SS sent emails posing to be Beckner.
Another thought: is it possible that the Rs wanted SS to be with them during the interview, yet they didn't want to raise eyebrows about that so they invented a job for her (doing their makeup). That way, she would be allowed to be with them so they could keep their stories straight? Weird, but possible.
Camper, do you know how large the S's house was? Have you ever seen the outside of it?