Thank you for a quick reponse, catymag!
a.) Files stored in this site (mirrorcreator.com) probably are all blocked by our ISP.
This is what I get when access to this site:
Unable to Resolve Domain Name
Please make sure:
- You have connected to internet.
- Your DNS server settings are correct.
b.) And thanks for explaining! With a patched Mapsource one can transfer the map (*.img) to a pc disk (the "Unauthenticated" issue remained the same), then unlock it with Fast IMG Unlocker, then copy it in your gps.