While installing Fedora Core 4, it was time to investigate how to make the system fully operational. yum is still the defacto updater for RedHat's OS, it seems Some useful tips can be found here: http://www.mjmwired.net/resources/mjm-fedora-fc4.html
http://www.fedorafaq.org/
http://home.gagme.com/greg/linux/fc4-tips.php
http://stanton-finley.net/fedora_core_4_installation_notes.html