I just take one of the original trifold play books (whichever is closest to what I want layout-wise) and edit it using Adobe Acrobat Pro. It's probably about the least efficient way of doing it, but I haven't taken the time to learn InDesign or anything else. There are threads out there that discuss the various fonts used by the play books, but you can get them from the document properties in Acrobat. There's also a good explanation of the technique for making the cool B&W images somewhere, but I'm on my tablet right now and don't have the links handy...