choosing .sty file:
-you can find it by looking in the mmp file
-you can try it out(most of the time bil, ste or wil but never fstyle)
-you need to change camera position slightly to see changes
-dont forget to change the sty file when changing the map (there are also sty files that are very similar to the stock one)

MapZoneNames:
-use overlapping Zones to use this for controling what district name is shown when entering it
-for (completely) overlaping Zones use the classic Zone Editor

MMP:
-the [addon] section is obsolete