Problems
========
 - On GPSMapp 66 (and as I heard 64 also) there is a problem with OSM Unicode
 maps. Device complains "cannot authenticate map". It seems Garmin requires
 all Unicode maps to be signed. Non-Unicode maps (from openmtbmap project) work 
 well


Note
====
(Of course you could also define the .img files by folder, and you probably
have to add the path wo mkgmap) This will create a gmapsupp.img file, that
you can upload to your GPS in USB mode (place it into /garmin folder on GPS
internal memory or memory card)

Note that all 6*.img have to be from the same openmtbmap country file -
otherwise only one "country" will show in proper colours. You can instead of
deleting all but one typfile replace *.TYP with e.g. clas*.TYP or the full
name like clasde.TYP.

-–family-id should be the same number as the first 4 digits of the maps (if
- you use a different number, you have to adjust the FID inside the
- .TYP-file). Note every map on your gps needs a different family-id (else
- they won't be shown).

-–family-name can be set to any value (only use letters and numbers, no
- Umlauts or symbols) and will be shown as mapname on the GPS maplist.

2 b) if you want to have contourlines (altitude lines) included too, just
change the above command from "6*.img" to "6*.img 7*.img" and put the *.img
from the contourline download into the same folder before running the above
command.