Scare-a
My idea involved a promotional event that would get media attention if you tip them off!
Contact performing arts students and make up students, ask if they want to be part of a promotional event, in return they would get a reference on their cv and a double movie pass.
On Halloween (Oct 30) or following week if too short notice) They need to dress as Zombies ( with rec2 logo some where on costume) and congregate at a pre determined area in the CBD of Akl, Wtgn, Chch, Dun. Zombies can travel by bus, train and even groups on a boat, open it up to the public too and offer a prize of $500 and movie passes for entering and coming in costume. You ay even want a few not dressed up people yelling Zombies are coming.Post it on competition type websites that get lots of traffic and you might get more interested participants. Id decorate my car and grab a few friends and drive around making Zombie noises
Media ( tv, local papers) will capture the Zombies invading (because you let them know!). So you could get wide spread exposure for the movie. Public will see them coming into town by their different modes of transport and take a second look.
Once again we need to remind everyone that just talking about something is as useful as a zombie with an allergy to brains. Talk is cheap. Please read the rules everyone, there is no cash for just having an idea. You actually need to do it !