I saw a user that stated the 1490t has the option to show the upcoming street when driving without an active route, i have a nuvi 40 that has that function and need the 1490 to have it too. Will flashing the 1490t firmware give the function and is it even possible? Since i dont know if these two models have same cpu and such, ive seen a few conversion threads between different models (ie 37xx to 47xx). I have knowledge restoring firmware via cure and preboot, but im unsure if the device can be bricked beyond recovery possibility.