To answer your other question on ATPL conversion. At the time of the conversion, all CURRENT qualifications are recognised, including the I.R.
What CAA will give you depends on what the CASA Letter of Authentication says. e.g. if it says that you have GNSS approach on your I.R. you get that endorsement. They will only add aircraft type ratings if those types are currently on the NZ Register.
For complex types (jet etc) they want logbook evidence that you have actually flown them.
Do a medical, do a check in the simulator on the type you will be flying, include the I.R. renewal with that check, and job is as good as done.
CAA NZ are most co-operative. I wonder if Kiwis find it as easy coming the other way to our CASA system.