You need to configure Samba - there's loads of documentation and FAQs and a really good O'Reilly book on how to do this and hook it up to Windows.
A recommendation I would make for you is to use a more up-to-date Linux distribution than RedHat 9 - it's very old. Take a look at the Fedora project, or CentOS for something current, but still sticking with the RedHat way of doing things.
They can be downloaded from the link on the right labelled "Download Linux", or
clicking here.