If you want to access Windows PC's, you can just do:
in nautalis or konqueror to browse your windows files shares. Think you may need the samba client package installed for this(??)
If you want windows PCs to be able to access your linux box, then you'll need to install the samba server package and use the gui interface to set it up. From the menu: System Settings > Server Settings > Samba
There's some bugs in the version of samba that ships with FC2. Make sure you update to the latest FC2 version before trying to set it up.
Hope that points you in the right direction,