Hi everybody, sorry for the late response. Please take in consideration that Navit is in alpha stage and the N8x0 port is more alpha than the PC version. Actually there's a memory/cpu limitation in how Navit handle big maps, specially garmin ones. Please try to keep your maps as small as possible and use Swap. The project is really promising, a 3d gui using SDL could be possible to do (I'm working on that) and routing is 90% finished. It's just a matter of time, so patience Thanks.