Hey Bob,
There are a few steps to follow as per below:
1. Goto protocols and add your new protocol information and port numbers, making sure you select "Display in rule window"
2. Create the network entities of your internal notes server.
3. Create a Rule that allows access from your external interface to your internal interface and select your Notes server as the "Destined for". In the services tab select your new protocol.
4. create a redirect from the external interface to your internal notes server and select your new protocol.
5. check the gsp.cf file in your sg/ directory. if your protocol is in the gsp.cf file then the raptor will be listening on this port. " as per michigan said get a port scanner to double check".
if you have any other problems check the symantec web site for a KB that will walk you through it.
Good luck