FC4 and cups-lpd
Just in case anyone else becomes confused over the default cups install for FC4--it doesn't include cups-lpd. In order to provide cups-lpd services ( if you have an old legacy network with lpd everywhere), then you need to :
yum install cups-lpd
which will install the missing lpd part and the xinetd configured for lpd services.
Don't make the mistake I did and stuff a printer file in xinetd.d only to (finally!) realize I ddin't have xinetd installed.