You need to download samba-3.0.2a.tar.gz.
once you download it, switch to where you downloaded it.
then run this command:
tar -xvzf samba-3.0.2a.tar.gz
This will decompress the files into a new directory, probably called samba. Go into this directory, and run:
when done run:
when that's done run:
This will install samba for you. Then goto www.webmin.com.
Install this tool! It will really help you with configuration of samba. They should have an RPM you can install. I hope this helps you. Good luck.