The reason you are having trouble setting up the shopping cart is that the software is intended for people who know a bit about setting up server side function scripts. Buying the template is only the beginning, and it takes a lot of work to set something like this up. It is for this reason that most who wish to set up a professional online store front turn to the ones that do this sort of thing for a living. For the do it yourselfer, PayPal offers a simplified version of a storefront. Although it does not look as professional as Zencart, it is free and can be set up by the average person. You are in way over your head on this, you need a web developer.