I have a "thing" about the fact that instead of asking for help, you seem more interested in posting critiques.. Somewhat counter intuitive IMHO.. **shrugs*
IMHO, if you are looking for EVERYONE to provide step by step instructions for every question you ask here, IMHO you will find seeking help on this forum a frustrating experience..
IMHO you will need to get over your trepidation about mod installs. If you plan to build this site yourself using Zen Cart, then you are going to have to get ready to roll up your sleeves and be prepared that all kinds of things will go wrong..
Nearly ALL mods (with the exception of most templates) have some folders that need to be renamed to match your own store's folders. Mod authors cannot possibly know your stores template's folder name or what you re-named your admin folder to. So you will have to be ready to roll your sleeves up and get your hands dirty when installing mods. As you do this you will see that there are some commonalities to how these mods are packaged.
Also be prepared that help isn't always gonna include the kinds of "bouncing ball" instructions you are looking for.. If something isn't clear, why not simply ask for clarification instead of posting blanket statements that provides no information on what it is you are stuck on. We're all trying to help and you seem very stuck on how the answer is structured and less on if the information posted is useful..
What I posted with regards to the file/folder structure is the SAME information Red Baron posted. Regardless of the format used to convey the information it is a relevant part of the install (hence why we BOTH mentioned it). Relevant because based on your original post, I believe that part of the issue you have is that you do not have the files/folders in the proper place on your site..
I wish you luck on setting this mod up, and to answer your question on whether or not having an XML sitemap matters.. I think the SEO experts will tell you that it certainly does. Google certainly says it does. Found this doing a simple Google search for "xml sitemap google":
Quote:
Sitemaps are a way to tell Google about pages on your site we might not otherwise discover. In its simplest terms, a XML Sitemap—usually called Sitemap, with a capital S—is a list of the pages on your website. Creating and submitting a Sitemap helps make sure that Google knows about all the pages on your site, including URLs that may not be discoverable by Google's normal crawling process.