On April of 2006 I wrote this about CentOS/RHEL/Fedora installers:
I actually like anaconda a lot. But I would like it even better if I could just get some sort of tool that, given a list of packages, would create an anaconda-based CD with customizable install scripts.
And finally, here it is: revisor. Now all I need is that someone makes it work with CentOS and I'm fulfilled :-)