Neat! I used to use quite a lot of Black Rock extract when I was brewing in NZ. Don't think I ever used the NZ Draught though...
It's funny how on the Iron Master labels they say " No Boiling Required" as if the kits weren't easy enough as they were. I think it was to help remove some or all of the cloudyness in the beer that boiling can generate which i suppose was a turn off to those who were used to their Budweiser, Coors etc..