This modification to zen cart will allow you to have FIVE additional sideboxes in which you can add a picture or text, links, etc. through your admin / Tools > Define Pages Editor area.

For Zen Cart Versions 1.3.9, 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.5.5+, 1.5.6+