Hi, same problems are now with the new nuvi 1695 and it`s firmware 2.40. Language guide is not recognized on the sd-card, so no installation. The procedure mentioned above is correct and worked fine on 1490 TPro until firmware 4.5. In a forum it is mentioned that there might be a problem in programming by Garmin and they are looking for a solution (soon ?) but it also might be a kind of "solution" by Garmin :-)

regards