I don't understand. Part of the CER agreement is interchangeability between NZ & Aus CPL licences. I didn't go through any of this nonsense when I got a NZ CPL based on my AUS one. The CER relating to pilots licences is quite detailed. I forget where it is, but you should find it readily. I'd be reading it first to make sure they are not making you do more than you need to. My recollection is that it is straightforward to read and quite specific.
Otherwise, a one on one session or two with an Aussie ground school guy should get you there quickly. My recollection of NZ is that the main differences are R/T. Try Lionel Taylor in Melb if that is where you are bound.