Plesk released a server migrator script which would allow you to install there software on a clean machine, then point there script to the ip address with the root username and password to the machine that contained the old server information and files. It would then download and reconfigure to plesk to make switching to there software easy. It would be nice to have a migrator software that worked similar to theres. To make it easy to bring users from one type of server to another. There scripts supports 5 or 6 different common types of control panels.
