I have this one: maybe the only silent VHS tape ever made. Every time I play it somebody walks into the room and asks me why I have the sound turned off. I think they should have dubbed the sound of a 16mm projector in for effect.
It's great stuff: It was filmed by Newell Martin and Linwood Moody (Moody later dedicated "Maine Two Footers" to Newell Martin.) It's famous for having quite a few scenes with the film flipped, giving mirror images. The titling is done with stick on letters on a pull down background to give a rolling title effect, and it reads much like Linwood Moody's writing years later. It's the kind of classic 1930s railfan film I would have loved to have been around to make. (Of course if I was I'd be dead by now, so I guess I can do without it...)
To my knowledge there has never been a guide prepared to it. Most of the yards like Phillips, Strong and Farmington are pretty easy to pick out by the landmarks. Sometimes if things seem a little spacially disoriented you look at the lettering on the cars, see that the image is flipped and then it makes sense. Out in the open country it's often hard to tell exactly where you are, but I guess in these cases you have to trust the original fillmmakers to edit locations in their correct geographic sequence. If they were trying to accurately preserve the line on film it's the right way to go about it.
The best vintage SR&RL film I've seen is the Gus Pratt footage. He had a talent for getting in close with the SR&RL: a lot of shots from the cab, and he was there at a lot of historical moments (unfortunately most at the scrapping).