Having trouble getting started

Hi All
Am a dreamweaver user and have just purchased the "User Registration Solution Pack". I run a sporting association website in Melbourne Australia, VBSA.org.au WE have a php database running and would like to develop a members area. Am having trouble getting started - have created the table but cannot get the next step. It appears that he Connections/localhost.php file creates the global settings? Or am I totally lost?
<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_localhost = "What goes in here?? is it the URL of the site?";
$database_localhost = "is this what dreamweaver refers to My SQL connection as the database name?";
$username_localhost = "please type your username";
$password_localhost = "please type your password";
$localhost = mysql_pconnect($hostname_localhost, $username_localhost, $password_localhost) or trigger_error(mysql_error(),E_USER_ERROR);
?>
Maybe I am just having a senior moment? Any assistance would be greatly appreciated