pages created from a template are virtual pages.
first you create the template in the PowerCMS content list, go to the developer notes section to get the code to add to the page that you will use to display the template content.
now when you create a new page form the template, look at the developer notes for the individual pages, this will show a URL variable to use to access that pages content.
you will load the same physicle page, but change the querystring variable value to show different virtual page content.