[cotc2001]

Not an answer to your problem BUT something else you might want to add in if you sell worldwide is that because of the increased fraud risks involved in shipping to a address other than the customers card billing address you may want to limit the different shipping address on a per country basis.

We are looking into getting this coded ourselves as well but in the "countries" section of admin have an extra checkbox that will allow us to assign the extended shipping address section to appear only for selected countries.

i.e I would allow USA, Canada, UK and Australia but I wouldn't allow it for singapore, taiwan and china etc. (just using these countries as an example purposes)

I'll be asking x-cart team for a quote soon so i can let you know how they are quoting if you like.