samba - Feb 2005 - adding a samba printer with cups on a different network

Hi,
if I want to add a printer to cups (SMB printer) in the same network of the 
linux machine, I can use lpadmin:
lpadmin -v smb://s93/hps93 .......

but what if I want to add a printer of another network? Where can I specify 
the ip address? I've tried with something like:
lpadmin -v smb://192.168.2.20/hps20
and the printer is added, but it does not work then.

Any help?

Luca
-- 
Luca Ferrari,
fluca1978@infinito.it