[CentOS] How to Automate Centos 5.7 CD bare bones build

Does anyone know how to automate a CD Centos 5.7 build.?

1) new bare bones workstation ( PXE enabled)

2) Boot from CD to the boot prompt

3) At the boot: linux ks=http://x.x.x.x/ks/cfg/org/1/label/Centos5.7

The workstation is able to connect to the server and the kick-start works great.!

Question: how can I automate  linux ks=http://x.x.x.x/ks/cfg/org/1/label/Centos5.7 on the CD?

Unattended installation after installing the cd into the workstation