How do i change the base ip of Cpanel for one of my servers. We are chanign the ip of all our servers in our data center and this is a problem i cant seem to solve. Please help.

Your dedicated provider should provide you with these scripts. If not, contact your CPANEL distributor. They have scripts to perform this type of thing. Basically the script is some form of perl code that runs and does a search and replace on important files. The process should take no longer than a few minutes.

or you can write a simple replace script yourself... as long as you know CPANEL file structure :)