changing locations in django satchmo

Question

I am using Satchmo(skeleton project that comes in the projects folder when you download Satchmo) but am not in the US. I see that by default there is a Zipcode/Postcode* and list of states on the checkout page.

My question is, is the best way to change this(location details, billing information) to edit the /satchmo/apps/satchmo_store/shop/models.py file (hard edit the Order model) or is there a better way to maybe set your location to a place other than the USA?

The reason I'm asking is because I'm not sure what implication a change like this might have throughout the skeleton project if I just deleted the zip code column.

Thanks.