I think it is the PayPal DB table I am looking for as the address details don't show up in the left hand column of the PayPal grey table on the Admin order edit screen (Under the code comment that says: <!-- BOF: pp admin transaction processing tools --> in the Zen admin edit screens HTML source code). The shipping address up the top (ZenCart one) is correct and the address details get entered correctly into the orders table.

Also the address status is entered into the PayPal table as "None" which is why I am guessing that I need to change something before it gets written there by replacing the empty response from PayPal with the ZenCart shipping address before it gets written so the address details will be displayed correctly on the order edit screen in admin.

Phew, does that make any sense