Need help in networking

[Squiggles]

Hi all. I need assistance on this matter, since this will be the first time I'll be doing this:

I need to put up a network, where the server is a Linux box (FC4 and Centos), and all of the clients are Windows-based. I've managed to set up the network already, and the clients are now able to see the Server.

Now, the only thing that I need to work on is the Internet Sharing. I need a a good guide to do this. Is there any guide that would get me up and about, without getting into too much detail? What components do I need to work on? Is there anything else that I need to understand first before doing this (i.e. Squid)?

I need help on this so that I can help my aunt get her room connected to the Net.

Many thanks in advance.