Follow the steps below to install WordPress with the Web App Gallery in the WebsitePanel control panel.
Login into WebsitePanel > Web App Gallery > WordPress > Install button > Next Button > Select Web Site from drop down > Enter unique Database Name (Not wordpress), Database User Name (not wordpressuser) and Database Passwords *
* A strong password with upper/lowercase letters and number is highly recommend to reduce the chances of a hacker database compromise.
Post WordPress install, please see following knowledge base article.
How to send WordPress emails with an SMTP plugin with authentication