Ok. lets see. graphical interface... don't think so. try linuxconf (you won't have it installed with normal 7.3) You can download it from ftp.redhat.com To start it you need it installed (i think it is something like smbd1.1.1-1.rpm but I'm not sure.
I've checked adn I couldn't change mi machine name wirh ifconfig. I insist, download linuxconf and it will be easy to configure anything. You could also try with "setup"
Configuring a SAMBA server should be easy, just modifying a few files.
I INSIST, try
www.google.com to look for some answers, or perhaps
www.tldp.org There are thousands of sites where you can get that info!
For downlaods you can go to ftp.redhat.com/pub/contrib/libc6/i386 there are ALL the RPM's