changing the default port on a clustered 2005 server.

I am unclear as to which Ip address to change the standard port on. When setting up a cluster you have multiple IP address's including the nic that is used for the heartbeat. I have not found any documention on how to change both nodes to listen on a port other than 1433..

Any help would be greatly appreciated.

Set the one titled "IPAll" (you may need to scroll to the bottom of the list). The clustered SQL Server instance will apply it to the actual IP addresses of the cluster.