I've been able to successfully kickstart CentOS 3.9 from the base repo, but no such luck after merging os and updates. I think I did everything right - updated base/comps.xml and regenerated hdlist/hdlist2. Updated the yum repo as well although I'm pretty sure it's not used by anaconda. This is difficult to debug. The setup is running under kvm on a CentOS 6.4 host, and for some reason, a completely headless install fails (--graphics none; virt-viewer complains loudly and dies). A graphical install with vnc looks quite different from newer OSes' ks installs, there is no VC showing package install progress or an interactive shell. I.e. I cannot tell what exactly fails. Yes, there is a specific legacy reason for using 3.9 here.