m25michelle-
in the System Preferences screen I click on Network and can then click on Appletalk. When I do that, it tells me that this will disable Appletalk on Ethernet Slot 4, which is where I am connected to the Internet for my DSL line.
You do not need a separate Ethernet port on your computer for the printer. If you have a Multi-port Router or Switch, you can plug the printer in there.
Ethernet is a highway, over which you can send TCP/IP packets for the Internet, AppleTalk packets for printers and older File Sharing, or both at once -- they do not interfere with each other. AppleTalk packets are not passed onto the Internet.
When you have Appletalk enabled on an Ethernet port, and the light for the port turns green in:
System Preferences > Network > Show:
Network Status
then you should also be able to select
AppleTalk in the:
System Preferences > Print and Fax > Set up Printers > Add-a-Printer box, but it may be on an
Other... sub-list.
If not, you may have to quit the Printer Utility (Add-a-Printer box) and select it all again to re-launch Printer Utility.