I'm not sure about Redhat 9 specifically, but for me the easiest way to configure a printer (assuming you're using CUPS) is to point your browser to http://localhost:631/admin
and click "Add Printer". From there you just follow the instructions. For driver support (or more support in general) you can check out http://www.linuxprinting.org
-- that site has helped me out on most of my printing problems!
Hope that helps...