"This article explains how to improve/optimize/speed up package installation with Yum, install packages with 'Yum Extender' (a GUI for Yum with extensive features to manage packages), and manage different external package repositories--with focus on prevention of problems with different repositories--on Fedora 7.
"This howto is meant as a practical guide; it does not cover the theoretical backgrounds. They are treated in a lot of other documents in the web..."