Sorry again, but i didn't find this by forum search.
I edit transparency\color intencity of unit path and region borders by alpha-channel in here
Spoiler Alert, click show to read: 
\Data\terrain\aerial_map\indicators\
move_arrow_1.tga.dds
move_arrow_2.tga.dds
move_arrow_3.tga.dds
path.tga.dds
region_borders_general.tga.dds
region_borders_main_colour.tga.dds
region_borders_primary.tga.dds
region_borders_secondary.tga.dds
region_borders_secondary_colour.tga.dds
sea_route.tga.dds

But I don't know where I can edit transparency or\and color intensity of unit movement area!