adding an hp jetdirect port

When you add a printer onto the print server, you go in and ‘add a port’. In that section you have the standard ports,
-digital network port
-LPR port
-Local port

in that section, i need to manually add another port option. The port i wantto add would be an HP Jetdirect port. That i use to then config the NIC on the printer.. The print server is NT4.0
Thanks a trillion.