I. Evidence that I have met or am able to meet any necessary New Zealand registration requirement. (Do I need to select this or not? My profession is Software Engineer which does not require occupational registration in NZ)
By pure logic, I'd say, tick the box. You ARE able to meet any necessary NZ registration (as there is none!). (They didn't ask, IS any necessary or not, so you can just leave that thought right out of it.)
Is this form online, or on paper? If it's a paper form, you could write beside the box about the payment, 'No, being transferred from previous application.' And the part about the medicals, 'No, already submitted for SMC application,' and add any reference number.