Ange,
I have a similar requirement in that I need to work with AUD.
You can modify the default currency by following these steps:
1. Go into the admin section for the subscription module.
2. If you do not see a paypal gateway on the list of installed gateways, you should add a gateway.
3. Once you have added the paypal gateway, you can customise it:
Paypal Account Name - enter the name of your paypal account.
Country Code - enter NZ
Currency [USD, GBP, JPY, CAD, EUR] - enter NZD
Paypal Post URL - if you are working with the paypal sandbox, enter
https://www.sandbox.paypal.com/cgi-bin/webscr. If you want to connect to your live paypal account, enter
https://www.paypal.com/cgi-bin/webscrHope this helps.
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Regards, Tom O'Dea
Webmaster, Australian Philatelic Society, Inc.