All you need to do is visit accounts.news.stuff.co.nz and click on the "Sign Up" button in the top right hand corner:
Now fill out the appropriate registration form. You must fill in your Name and Email address as it appears on your Newspaper Subscription. You will then be sent an email verification code which will go to your email address. Enter this in the box provided on the screen you just confirmed your email address.
Now you will be taken to the main screen of your publication of choice. Log in using your email address and password you just created in your registration form.
You will now be able to log in and explore the homepage, as well as access unlimited articles.
To view your account and make changes at anytime, click on the icon in the top right hand corner of the screen: