I completely forgot about that topic ...
The buildings are not important, you can use whatever you want, so that they are universal for all maps

You are asking too much. Be happy with this (you're complicating it unnecessarily)
Why do you need three independent publishers independently?
You can use mixed map package of those that are better for certain regions
Also, it's a ux made for standalone use, not in combination with a skin

Another recommendation - in such cases, the folder in the internal memory, not on the card