I found these instructions on usenet and they work for me:
The printer port on the SMC Barricade can be addressed directly by
Windows XP (and Windows 2000) without any additional software.
Here are the steps you would take to set that up.
1. Start the Add Printer Wizard
2. For the printer type, select a Local Printer, and clear the
Automatically detect... checkbox
3. For the printer port, select Create a new port, Standard TCP/IP
Port
4. In the Add Standard TCP/IP Port Wizard, enter the IP address for
the SMC Barricade (the Port Name does not matter)
5. When asked for the Device Type, select Custom, then click
Settings...
6. Change the Protocol from Raw to LPR, and enter "lp" (without the
quotes) as the Queue Name
7. Click OK to close that wizard, then Next and Finish to close the
port wizard.
8. Select the printer make and model as normal