At one of our customer`s there will be an ISP change, which will result in a public IP address change of a NW 6.5SP8 server.

Is there some `how to change IP address for dummies` kind of documentation available?
The server got 2 NIC. BorderManager (with VPN), Apache are some applications that going to suffer, I guess, so I`d like to have something that is covering these things.