I found this link while I was installing a printer on my Fedora Core 4 machine I run for scientific computations.
How to use the CUPS http interface to install a printer: http://osr600doc.sco.com/en/PR_gimpprint/x456.html
How to use the CUPS http interface to install a printer: http://osr600doc.sco.com/en/PR_gimpprint/x456.html