Understand the overall idea of customizing Zen Cart by following the links below.

• How do I create a new Custom Template?
• Template Files – What are they and how are they used?
• What is “template_default”?
• Language Files – What are they and how are they used?
• Where do I find the files I would edit to change other parts of my cart (i.e. template files, sideboxes, etc.)?
• What directories contain all the template images? (i.e. buttons, icons, images etc.)?

Follow the links below to learn how to do specific changes in Zen cart.

• How do I remove the logo completely? (modification to /includes/templates/template_deafult/common/tpl_header.php Save edited file to /includes/templates/custom/common/)
• How do I change the Copyright message in the footer? (Open /includes/languages/english.php; Then save edited file to /includes/languages/custom/)
• How do I change the “Sales Message Goes Here” or “Tagline Here” text? (Open /includes/languages/english/header.php; Then save edited file to /includes/languages/english/custom/)
• How do I add an image to the bottom of my sideboxes or center boxes? (Open /includes/templates/classic/css/stylesheet.css; Then save edited file to /includes/templates/custom/css)
• How to suppress some of my sideboxes from displaying on all other pages except my front page? (Open /includes/modules/sideboxes/featured.php; Then save edited file to /includes/modules/sideboxes/custom/)

Customizing through admin console can be used for removing and/or re-arranging the sideboxes

“Developers Toolkit” found on the admin console is a great tool to find out what files to edit.   (example)