Open the Admin, point your cursor at Configuration in the top menu. Choose Layout Settings from the drop down menu.
Find "Main Page - Opens with Category"
...By default, the module comes with support for 3 zones. This can be easily altered with a coding change by editing the Zones Shipping Module file (If you make this change and your Zones module is already installed/active, you'll need to record your settings, then click Remove, then click Install, and re-enter all your settings. Otherwise your change will have peculiar visual side-effects).
/includes/ modules/ shipping/ zones.php
...