am not stupid but can't figure this out.say I have a set of #s and want to get to that spot.how do I program them in to unit or do I just go there and wander around aimlessly until I hit that spot.also who ever writes the manuals for these things should include more info not just assume people already know what they do.also will basecamp3.0.1 help this unit?oh and how do ya know what software version is installed on unit.