How to reconfigure Spark (i.e. change server IP/Name and method of authentication)

How can I reconfigure Spark IM after it has been installed and it has attached to a Openfire server? I am in the process of migrating to a new server/IP and I need to change the default IP in all desktops. I have uninstalled the program and reinstalled but the configuration reappears (i.e. old IP). Also, I have checked the register (XP) and I have not been able to find the location where the system keeps the IP address.

Can anyone help me to get in the right track… I need to deploy the new server and I am trying to create a script to change in mass the desktop configurations so that they can autologon and authenticate with AD. I have already setup the LDAP to the main server and it is working…

Thanks for your help.

All connection settings are stored in C:\Documents and Settings\Username\Spark - spark.properties file