I am trying to change the catalog page in OS commerce. I found the post on Basic Guide to Customizing OS commercie and am in my file manager under my store. I cannot find a "catalog" file. So I go to admin, but I still dont find it. I opened the index.php file but it does not contain the elements I need to change. When I look at my source for my catalog online it is different than the source for the index.php so I dont think these are the same pages. Also, my page online is personalized with my domain name but the ones in the file manager are not. So where do I find the catalog pages so I can edit it?

Thank you in advance.