Well the point of PS is to be realistic, somthing to be immersed in, auto-mapping, doesnt work with that, if you really want a map, you should make one yourself, on blank paper, i made my own sewer maps, if you want copies ask me IG, but otherwise, make your own. You only have to wander to another town once or twice to memorize it, once you do that, you can make a map fairly easy.
And if the IG paper doesnt work for you, draw a map on printer paper.