All, this is how I do it:


1) Install Firewall IP.
2) Block all connections if using Firewall IP

If you don't want to install "Firewall IP" for just one program then add following line to the etc/hosts file (use iFile). Put a space at end of each line (do not use return)

127.0.0.1 [Only registered and activated users can see links. ] >space<
127.0.0.1 gold.garmin.com >space<
127.0.0.1 bronze.garmin.com >space<

3) copy ******* .img file to /var/mobile/applications/xxxx-xxxx/garmin-nav.app/storage-western-eu/.system
4) copy other files related to this map in mentioned folders: The JCV file is located in /var/mobile/applications/xxxx-xxxx/garmin-nav.app/storage-western-eu/.system/JCV
5) copy second ******* .img file to /var/mobile/applications/xxxx-xxxx/library/sdcard/garmin
6) use iFile and change all .img file properties as follows:

Ownership:
Owner: mobile;
Group: mobile

Access Permissions:
User: Read, Write, Execute
Group: Read, Execute
World: Read, Execute

7) convert mapsource waypoints into poi.gpi file with GPSBabel
8) copy to /var/mobile/applications/xxxx-xxxx/library/sdcard/garmin/poi
9) use iFile and change .gpi file properties as follows:

Ownership:
Owner: mobile;
Group: mobile

Access Permissions:
User: Read, Write
Group: Read, Write
World: Read, Write

10) start garmin app and search for mapsource waypoint in main screen
11) use this method to save as favorite


cheers,

Mouritz