I believe the 2008 amendments made it legal in NZ to strip DRM for legitimate use (though I haven't parsed what that is). I don't live in NZ (rather AU) so perhaps someone local can comment.
You can read the law (bill that passed) here:
http://www.legislation.govt.nz/act/p...LM1122502.html
You can see some comments here;
http://boingboing.net/2008/04/10/new...s-dmca-is.html
http://www.michaelgeist.ca/content/view/2829/125/