I have buyed a Garmin Nüvi 2445 LM whit the map of Europe, but half of it is blocked. How i can unlock all the map?
Or how i can insert an other map? Map Source don't find the device.

The map isn't blocked on your device, you have only a smaller Europe map on it (among the rest, therefore it was much cheaper than nuvi 2495 :D).

But you can use a complete unlocked map from here on µSD or in internal memory, if there is enough space.

Read this thread to get full access to your device and find the hidden map folder: http://www.navitotal.com/showthread.php?9026-step-by-step-replacing-internal-map-on-nuvi-1xxx-2xxx-and-3xxx