Thanks for the speedy reply... I'm not really sure but the guy at the shop told it has got an inbuilt navigation receiver just needed the NZ map downloaded on to the memory... I saw most of the Kenwood units use Garmin Navigation software.
Have you tried RTFM (Read the friendly manual) to figure out the type of navigation software? Maye there is a help screen in the menu's somewhere that will help identify the software. Without concrete information on the software it is a waste of time even looking for maps