OziExplorer is not excatly a road navigation solution. Once you've scanned and calibrated a map and imported it into Ozi it will show your position on screen but it cannot 'route' you as it lacks the data that comes in digital mapping. All it can do is show the 'as the crow flies' arrow to your chosen destination or waypoint.
If you run it on a laptop you look at the laptop, you can run it on a GPS equipped PocketPC as well but as I say, it's not a road navigation solution if you are comparing to the likes of Garmin StreetMaps, TomTom, Navman etc.