Importing the PowerCMS .SQL file
Hopefully i can clarify things for you a little..
PowerCMS comes with one .SQL file, which contains all the database tables you need for PowerCMS to function. This file can be found in the Database folder, named CMS.sql.
As part of the process for setting up PowerCMS, you need to import that file (or it's contents) into an existing MySQL database. I believe you have already found the How To which instructs users on how they can import any .SQL file into a database.
As already mentioned, this is a generic tutorial, and does not relate specifically to PowerCMS. Therefore, if the screenshots don't show the exact same tables - that is fine. Since the steps are exactly the same, we avoid "reinventing the wheel" by using this generic tutorial.