This is not a general forums area, it is for the DotNetNuke Core Forums module.  That being said I will attempt to answer your question.  That is just text in a text/html module installed by default.  You can use the portal templates to adjust the default content of an install to pretty much anything you want.  This is left up to the original end user.  To be honest with you, since the way the portal is installed it, the host should install and change the password right then and there anyways.