[CentOS] kickstart problems

>I boot via NIC0 and my configurations are as follows:

Yeah, that's what I thought.
Have a look at:
http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Installation_Guide/ch-pxe.html
&
http://kbase.redhat.com/faq/FAQ_80_531.shtm

The latter might shed some light. I am thinking you need tweak that a bit.
jlc