Take your pre-grant letter,filled in application form,fee,bank statement,payslip and a printout of itenerary (you can get it from expedia,webjet,etc) to the nz embassy, they will give you the tourist visa on the spot, if you go in person along with your passports.

__________________
ACS Sep 2010 IELTS 7.5 Dec 2010 ACS Approval-June 2011 PR Application-22 June 2011 Medicals-Dec 2011 Aus PCC-Dec 2011 India PCC-24May12 CO-23Jan12 Grant-25-May-12