Flashing with this splash is a good start to enabling routes on 13xx. This is easy and safe, the rest is fraught with danger and not for the feint hearted or inexperienced. Asian 14xx fw is the only way as far as i know. Have a good look thru this thread: [Only registered and activated users can see links. ]. In the last post dasilvarsa report enabling custom routes and more using modded Nuvi1480_360 JPN fw, but there were many hurdles and he lost Pedestrian Mode. Maybe you should post in that thread for help after you read it entirely.