BraaiGuy: Maybe a better solution:
For freeview on your PC you try TVNZ on demand and TV3 ondemand?
Then for isky you can use http://www.isky.co.nz/ (But you will need to be a valid sky account holder)
For all of the above you will need to have a NZ Ip address. Search the net for a suitable provider that has an NZ server. I know Astrill has.
TV3 and TVNZ on demand does not work in the UK. (Might work through a VPN)