Go into Mandrake Control Center, Software, Install Software. Then install samba.
You can also configure Samba (I think) using Webmin. You've been using Webmin, right? Open a browser, go to https://yourhostname:10000.
This is a GUI system administration system that handles, well, basically everything.
Not only is this not a silly question, many people think Linux/Samba is a better Windows server than Windows.