Revisor enables you to customize and compose your own Fedora based installation and live media. It does so by presenting you a GUI with all options you can click you way through, and a CLI and extended configuration files for the more advanced users. Features that Revisor has vary from customizing the packages available during the installation and/or installed on the live media, to fully customizing the desktop environment for the live media.
If you are running Fedora 7 or later you can install it using yum:
# yum install revisor