Just thought you might like to know:
I've made a new NZ English dictionary on and it's just been AMO
approved. It's the same as the old one except it's packaged properly
(actually shows up in the dictionaries section of the addons manager)
and is marked as compatible with Thunderbird and SeaMonkey as well as
Firefox.
https://addons.mozilla.org/en-US/firefox/addon/new-zealand-english/
GL