The first thing you need to do is split NZ up into those two zones
Go to ADMIN >>> LOCATIONS / TAXES >>> ZONES
When the zones list appears on the screen, navigate down to see if New Zealand is already "zoned".
If not, then click the NEW ZONE button
Then, type into:
ZONE NAME: North Island
ZONE CODE: North Island
COUNTRY: --- Select NEW ZEALAND from the dropdown.
CLICK INSERT
Repeat the above for South Island
NEXT STEP:
Go to: ADMIN >>> CONFIGURATION >>> CUSTOMER DETAILS
For: "State - Always display as pulldown?" - SET TO TRUE
NEXT STEP:
Set up ZONE DEFINITIONS
Go to: ADMIN >>> LOCATIONS / TAXES >>> ZONE DEFINITIONS
CLICK INSERT BUTTON
Then, type into:
ZONE NAME: NZ North Island
DESCRIPTION: New Zealand North Island
CLICK INSERT BUTTON...
REPEAT the above for South Island
Then you must give DETAILS for each of these new zones, so, in the main Zones Definitions screen, SELECT "NZ North Island"
After the screen refrreshes, click DETAILS button
Screen will again refresh
Click INSERT button
SELECT COUNTRY: New Zealand
SELECT ZONE: North Island
CLICK INSERT
Go back to Main Zone Definitions Screen and do the above for NZ South Island
When you have done all that, come back to this thread, because the next step is to install a NEW shipping module to handle these new zones.