[cflsystems]

The best way is to hard code it just like the other standard fields are - I have done this already and it is the best way at this point.

If you turn off all standard fields and just redo them as additional fields it will not work - these additional fields are not count as address fields and their values will not be populated in address book, you will also get errors if you try to use X-Payments for example as it relies on the standard fields, as well as any other payment method or any function that needs customer info....