Thanks,
I was looking at the following postal charges:
local area free
NZ national 6.00 3-5 days
AUS 18.00 10-14 days
USA 20.00 upto 21 days
Uk + Rest of world 22.00 upto 21 days
Orders outside NZ of $200+ free postage.
and how they could be added using a module either existing or downloadable to automatically be slected when a user selects thier country in the shipping details.