This is an updated Sage Payments Module formerly know as Net 1. Sage Payments took over Net1, so I have changed it so that it refers to Sage Payment instead of Net1.
This has been tested on Zen Cart 1.3.9d .

You MUST have an Established Sage Payments Account.

Curl must be compiled into your PHP with SSL Support.

I've added a test file, sage_test.php. Edit the file and enter your Merchant ID and Key along with a legitimate e-mail address and you can test your connection to the Sage Payment Processor to make sure you are communicating with there servers.

This module does NOT store Credit Card numbers in your database. You can access them via your Sage Payments Virtual Terminal.