Fedora is an RPM based distro, so any package included in the installation CDs is in .rpm type. Perhaps there is a source rpm (they have the extension .src.rpm or something). You can install them using your distro's package manager or from command-line with: rpm -iVh package.rpm.
If you d/l samba-version.tar.gz this is the source code and you can install it as I told you. There are utilities to tranform from tar.gz to rpm and viceversa but never used one.
You might take a look
here