How to get a transit visa - Hong Kong, if i am on a Sri Lankan Passport but am NZ PR.

I am 18 Years Old and my father works at Air New Zealand and we are both travelling to Sri lanka on 1st January 2013 under Staff tickets. However, I have Sri Lanka passport and I have to get the transit visa in Hong Kong. I have already been to Hong Kong and got the visa from the Chinese Embassy in Wellington. As I am already planning to go in january, I would like to know how to go about it and the documents necessary to get one for transit, these including transit application form (Hong Kong), fees and physical address of the embassy.
Thank you for your time


Kind Regards

Dimithra Heshan Thamel.