How to Install:
Make always a backup before replacing anything!
in OpenIV go to:
D:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto V\x64b.rpf\data\cdimages\scaleform_generic.rpf\
click on edit mode and put all the "minimap*.ytd" files from the archive to OpenIV;
Notes:
As of now the map change only in the pause menu and when zoomed out (as shown in the screens)
For the radar i found some .ydd files wich contains all the road as a 3d plane but they are not editable at the moment.