This article will assist you in creating a redirect so you can simply type in http://<servername>:<port> in your address bar and it will automatically redirect to http://<servername>:port>/ehelpdesk
Attached is an index.html file. Download and modify it so that <servername> and <port> reflect the appropriate servername and port for your eHD server. Once modified, place index.html in your <tomcat>/webapps/ROOT directory to make it so that tomcat mainpage redirects to /ehelpdesk instead.
Make sure to backup your existing index.html file in there. Also keep in mind you won't be able to access the tomcat manager application (if installed) unless you explicitly type in /index.jsp into your link.