bloody hell .. got it working!!!

Tip - ignore everything that navicore tell you, ignore the silly 1gb memory card you get with the navicore bundle. I had to reformat my own memory card (sitting in the internal slot, in the battery compartment).

Install the 'map' application from the install application list.

Install the 'navicore' application from the install application list.

Check you've got a wifi connection, start the map/navicore app. Use the 'map' option in the option list and do everything 'szucsati' says above, but make sure you have nothing of any 'map' or 'navicore' on any other installed memory card.

Will try the voice download now.