I've done a bit of further research. The AWA should receive NZ channels 4-11 perfectly as long as you remember that the channels are named differently. NZ channels 1 to 3 probably won't be received properly as the frequency allocations are 1 to 2 MHz off. The tuner can't be adjusted for this unless the fine tuning has enough range to cope.
Refer to the following Wiki article for matching the channel allocations between Australia and New Zealand.
http://en.wikipedia.org/wiki/Austral...TV_frequencies