Sorry for taking so long to reply. Yes, you do have to have respiratory and neuro experience to get NZ registration. You don't have to have a lot, just as long as you can prove you meet the competencies. If you've ever worked with any disabled athletes maybe you could use that as your neuro experience? Respiratory may a little more difficult but if you could get yourself onto a weekend respiratory rota of a local hospital you could probably get enough experience that way and then just head striaght for an MSK job when you get to Aus.
Hope that helps.
Claire