Would it help if we had a menu item in the MapMaker app for the manual and ditto for the other maps?
Yes.
Those of us who are familiar with the game know where to look for the information.
Those who are new to the game and look at SceneMaker, Mapmaker, and Estab Editor would tend to look for a "help" or "about" to learn something of the software. Linking the game manual there would "help."
I'd also suggest a link to the game manual on the introduction screen, and perhaps links inside that document to the SceneMaker, Mapmaker, and Estab Editor manuals.
I make an assumption when someone posts a question regarding the game mechanics that they hadn't read the manuals.
First key in getting people to read the technical information is to make it readily available, and easily found.
Of course, once people start finding, and, hopefully, reading the documentation, you'll get all kinds of feedback on grammar and sentence structure ;-).