I am getting ready for my 1st off-road trip and downloaded all of it into my BMW Navigator IV as tracks. Question is, how do I work with tracks in Navigator/Nuvi? Where do I tell the unit to "follow that track"? With routes it is simple, select the route and you are done... Is is the case that I need to be at the start of a non-routable/off-road track in order to "see it" on my screen and then follow it? Please pardon this noob's ignorance but remember, you have been a noob someday as well!!