This plugin will allow your customers to be able to track their USPS shipments on your website instead of having to go to the USPS website. Code can be placed in a side box and/or a customized defined Zen Cart page.
Please be sure to indicate in your comments section WHERE you want the code installed. EG: sidebox, shipping and returns page, new ez page, etc.
Works with Zen Cart versions 1.5.4, 1.5.5 a-e