My task at hand is to link into our Zen Cart from various web sites and provide a convient way for the shopper to navigate back to the web site they started from.

I think adding a main menu "Return to..." item which is linked back to the calling web site would work well. The return url and a label would be passed as parameters to the Zen Cart. The "Return" menu item would reference this url.

I'm new to Zen Cart, so opinions on this approach are appreciated.

Based on the tutorial at http://www.zen-cart.com/wiki/index.p..._API_Tutorials I think extending the /includes/application_top.php to watch for the return url as a GET parameter is a good place to start. When a return url is detected, a "Return" menu item would be added to the main menu.

Before I get started on this, I would welcome anyones input on whether there is a simpler way, or on modifications that have already been created that I can use, or advise on the most correct places to code this customization.