We don't include 3rd party, non Shape 5 extensions,components in our quick installs (site shapers) because of updates that would need to be added to them and even though GPL we don't like redistributing them on our site. So this is why for the ecommerce templates they aren't included. But all edits to CSS etc are included so all you have to do is install the 3rd party software and perhaps publish modules from it, like shopping cart, product modules, etc.
So with this scenario we do realize that you may need support for this if you aren't familiar with how to go about all this. As mike said we do have tutorials in above URL and also on each demo we have tutorials. For example our newest ecommerce template has a tutorial on how to set it up here (lots of specifc to template tutorials are on our demos):http://shape5.com/demo/shopping_bag/index.php/tutorials-mainmenu-48/setting-up-virtuemart-and-redshop
If you do need help outside all this post in the board specific to your template and someone will help you from there. We try to stick to a 24hr response time. So when you post within 24hrs you will be responded to. This is only mon-fri, weekends are not guaranteed.
Hope this helps and we are happy to have you here!