Hey
Converted mine in 2011 , lots of papers to fill pay some money and then they ( CASA ) will send you the AUS CPL , before you leave NZ get a verification lettr from NZ CAA so that you can sent it with your papers to CASA .
MEIR. I too had that multi Pilot , but I am not aware of the flight test attempts, but mine was lapsed when I converted to Aus CPL, so CASA told me that they can give me a NVFR but cant convert the IR , either I need to get the IR renewed in NZ or else do IREX and a flight test ( SP) to add that to my AUS CPL.
I found the system more helpful and CASA was helpful too, write emails and get it clarified.
Hope this helps
JAMUP