This is the official CODN gateway plugin for WP e-Commerce.
How to use it:
Having installed and activated the plugin, go to the WP e-Commerce settings page and select the Payment tab. Here you’ll be able to select and configure the payment gateway.
Once that’s done, it will tie in with WP e-Commerce automatically.
The plugin has been tested with WP e-Commerece 3.9.0.
No screenshots provided