Quote Originally Posted by pts3227 View Post
please correct me if I am mistaken, if I copy those files to my admin, they will replace the existing folders with the same names, and for example, everything under the existing adim folder (which is a lot of information) will be erased? When I ope the dual pricing I have an admin folder and includes, then 4 readme files... am I looking at the right thing? Where exactly do these folders go? Do I rename them so they don't erase the like-named folders?
You are looking in the right place... The files in the admin and includes folders are files that are included in the core code of Zen Cart 1.3.8a. You need to update the files in ZC with these new files (you want the files to be overwritten but not the entire directory, there are many other much needed files in these directories). If you have not installed any other modules before this one you can safely over write the files directly.

There is one folder you will need to change the name on. It is includes/templates/YOUR_TEMPlATE/ you need to change the "your_template" to the name of your template.

All this is included in the readme.txt files. I'd read those very carefully.