Hey, after seeing your post, i thought i might throw in my 2 cent. 🙂 Med schools in Hong Kong are, according to a couple of my friends (which may not be soo reliable), very difficult to gain entry into. If you're looking to apply to HKU, be warned that they have very few places for international students. You also have to be excellent in cantonese in order to apply.
Also, it takes 7 years of med school in Hong Kong instead of the 5 or 6 years in New Zealand (I'm from New Zealand as well and am in my 2nd year of med school in UoA).
But I do encourage you to apply to Hong Kong becoz of the clinical experience you will have and the quality of education are vastly superior than New Zealand for reasons that are clear to anyone who has at least had some knowledge of the health system in New Zealand.
How do u go about applying? who else better than asking the university directly? just google HKU and email their med faculty about ur interest in applying to the medical programme and go on from there.
Good Luck
Jerry