How to set alias for Desktop Director URL

When desktop director is installed , it can be accessed via http://<server name >/Desktopdirector  . But DNS will not allow you to create alias , so you will be always need to type http://<server name >/Desktopdirector  . In order to get access via just server ie.  http://<Servername> we need to make change in IIS or create Default.htm file under wwwroot folder. Content of Default.htm will be  
Other way of doing is to redirect http request from http://<servername>/desktopdirector to http://<servername> from IIS