Um - Ok. So I've attempted to create a listener using the net configuration assistant and have ended up with this:

ORCLISTENER1 =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = home.knet)(PORT = 1521))
)
)
)

in my network/admin folder under listener.ora. However, the assistant advises that "the information provided for this listener is currently in use by other software on this computer. You can proceed with the configuration as it is, but it will not be possible to start this listener until the conflict is resolved etc." This message is displayed even after an Oracle restart and a WinXP reboot. And I still can't use SQL+.

Did I mention that I was a newbie? Some more detailed assistance would be extremely gratefully recieved :-)