I'm not sure about RedHat, but with Suse, you can simply boot the machien with the installation CD in place, and and then choose manual installation and text mode. You have your floppy in the drive at the same time.
Here's a link to the Suse KB that describes the module loading process for a sound card - it might help you, although I failed to load the card module using this method.
http://sdb.suse.de/en/sdb/html/hmeyer_hpt37x.html
HTH