I should also be able to adjust the values of the customer details form. Any preset should be adjustable to the user's needs. We live in different dimensions of the world, and while, for example, ZIP codes, fax, VAT, etc may be important to one user it may not be to me and for the target market I seek.

Apparently, I cannot edit the country list in the customer details, but the market I seek is just one, and I have to subject my customers to selecting through a bunch of countries that are not relevant to them for the purchase.