Hey,
Sorry to hear you had so much trouble! I'm hopefully going to go to NZ too(I'm still a student at the moment!). You should start by reading this: http://www.physioboard.org.nz/registration.asp
and follow thier instructions You will need to prove you have demonstrated thier core competancies (on the following pages) which is quite a bit of work, but it all sounds quite straightforward once you have done this. Hopefully less hassle than with South Africa! Sounds like there is plenty of work there too.
Good luck!