there are a few tutorial on the Tutorial and training page to help you get started:
1) Set up your dreamweaver site for dynamic development, see the "Defining a Dynamic Site in Dreamweaver" tutorial
2) Create a database on your Testing server.
3) Create a connection to the database in Dreamweaver. See the "Creating your database connection in Dreamweaver" tutorial
4) Create a new php page ands save it to your site.
have this page open before running the security assist wizard. The security assist wizard will create the users table needed in the database you have created.