[CentOS] Squid +Yum = apt-cacher?

> If you are imaging servers over and over wouldn't it be easier to
> maintain a local repo and setup pxeboot with kickstart?

Have you looked at Cobbler <http://http://cobbler.et.redhat.com/> and 
mrepo? <http://dag.wieers.com/home-made/mrepo/>