Never mind, I got the solution for this through other means.
Step 1 : Update the apache welcome.conf file as follows
"<LocationMatch "^/+$">
Options -Indexes
Redirect 301 / http://<Server IP>/qcbin/start_a.jsp
</LocationMatch>"
Step 2 : Request the network administrator to create a DNS entry "ALM" and point it to your ALM Server's IP address
Step 3 : Wait for the DNS entry to take effect. Try "ping ALM" from the command prompt of your local windows system
Step 4 : Now if you try http://ALM, your application would launch