No, must admit not sure how to do that. That said I am more interested in your prior comment -
That hidden input is most likely being "overwritten" by the base form's address-selection
To this person who is pretty rubbish at forms, what does this mean, and where would I look to correct this ?
You need to "View Source" when the checkout_one page is presented (that's Ctrl+U on FireFox) to see if there are multiple inputs named zone_country_id[ship].
Setting up an AU Zone for shipping is fairly simple (although multi-step):
Localizations->Zone Definitions, click Insert. Zone Name: AU Shipping Zone Description: Limit shipping to AU-only, press Enter.
Now, click the Details button associated with that Zone Definition: Country: AU Zone: All Zones (some versions of Zen Cart show this as Please select), press Enter.
Now navigate to Modules->Shipping. Select each of your active shipping modules and set the Shipping Zone to AU Shipping. That will enable those shipping selections to be active only when the ship-to address is in Australia.
Definately only one zone_country_id[ship]- most frustrating!
http://61.245.139.145/zencart
OK, will need to upgrade zipship - still using original version.
Another question - how would I 'blank out' the default shipping information on this page - or at the very least just the zipcode.
Might sound silly but its quite important for what I am trying to do.