Adding New Countries

To add a new Country, login to Commerce Manager and go to Administration > System Settings > Dictionaries > Countries.

Click on New Country and fill in the following displayed in the Overview tab:

Country Name - this is the friendly name that is displayed in the public site during the checkout process
Code - to obtain the code, go to this MSDN site http://msdn.microsoft.com/en-us/library/ee799297%28CS.20%29.aspx (use the ISO Short Code or ISO Long Code as long as you remain consistent)
Sort Order - enter a number starting from 0 (the lower number is listed on the top of the drop-down)
Visible - Yes/No

Regions refer to states, provinces or prefectures. In the Region tab, fill in the following:

Type a Friendly Name (e.g. CA - this will be displayed in the public site during the checkout process) and click Add. You can checkmark it either as Visible or not on the public site

When you click the Edit icon, you can change the Ordering of the region. Click Update to save those changes.