Yes you can duplicate a Shipping Module in Zen Cart, and you can assign specific Zones to the duplicate modules.  If you have a more complex shipping scheme, this allows you to do things like apply different shipping rates and handling fees to different locations.

Lets Begin:

1. Clone the following two files:
/includes/modules/shipping/table.php
/includes/languages/english/modules/shipping/table.php

to the files (or whatever you want):
/includes/modules/shipping/table1.php
/includes/languages/english/modules/shipping/table1.php

2. Change all references of "table" to "table1" in /includes/modules/shipping/table1.php:
table to table1, and TABLE to TABLE1
*NOTE: These are case sensative ...

WARNING: Do NOT change anything that starts with the word TABLE_ as this is a physical table in the database ...

Now change  /includes/languages/english/modules/shipping/table.php appropriatley.

You should now see a Table and Table1 shipping module.  You can configure these independently, and then assigne them to specific Zones.

This can be done with any of the shipping modules (Free Shipping   . . . )