So at least the game works with extracted townhub files. Now we only need to find a test person who can´t leave towns... I´d describe the difference between the hub files and the msk files a bit differently. The important ones are the townmsk, the buildings are marked out. The hub files are decorative. Think of it as a table with a nice tablecloth. The table is what you use, the cloth is only there to make it look better
I´m not sure the gates counts as buildings though...