Only on pages that are protected by security assist already do you need to attach the new PowerCMS/WA_CMS/WA_CMS2.php file.
On all of the other pages of your site, you should attach the PowerCMS/WA_CMS/WA_CMS.php file.
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These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.