ISPconfig and multiple servers

[Bikerepairman]

I installed ispconfig a few days ago in a test-environment and i'm very pleased about the program.

I have a small question. At the moment I have a webserver (2 domains) and a windows fileserver for our hobby network.
Soon I want to add more servers; migrate the fileserver to linux, put mysql on a separate server and an application server for internal use.

What is the best way to point ispconfig to the new mysql server and the users to the fileserver? In the future we want to split the ftp server and the mail server too