Do you also have swat loaded. In mozilla or konqueror type in
http://localhost:631
this will invoke swat's online configuration to setup samba. Either that or do what I did the first time. As root open up the samba.conf file and edit it to your heart's content. Be forewarned, the default file has options for everything (hint, lots of stuff you might want to edit out). If you don't have swat look in your distro cd's (sorry don't use redhat but used to Mandrake) and find it there. Swat is fairly easy and straightforward to use.