Sorry dasilvarsa, I missed your post and just saw it now. I didn't see where any good description on the MTK version of this device in the first post, but I still gave it a shot. I downloaded the nuvi13xxand14xxseries_GCDFile-MTK__610.gc, built a cure rgn file called 110401000610.rgn from GarminCure3.exe. Oddly clicking on the updater button from garmincure3 did not work so I ran updater 110401000610.rgn. This returned that no updates were available for the device. I'm not sure exactly what this means, but it sounds like either it doesn't think that my device is MTK or that it doesn't need any updates. So this attempt did not work either.