making your own distribution DVD

I am trying to create my own linux distribution that could be
distributed on DVD's or CD's
as ISO
I came across some sites like http://www.linuxfromscratch.org
I have read the things there but what they do not tell is creating ISO
from the LFS system
A few more searches revealed that this question is not it has been
asked on may forums but no satisfactory answers are there
new some tools exist
Project Revisor
http://revisor.fedoraunity.org/news
For suse
http://liquidat.wordpress.com/2007/0...-spin-creator/
http://en.opensuse.org/KIWI

http://vertito.blogspot.com/2007/08/...tro-howto.html

http://www.linuxquestions.org/questions/showthread.php?t=587273

I think I need to create spins and an installer with a kernel image
that is capable of loading basic drivers
i do not want to use an automated tool to do so since that way I wont
be learning any thing
so suggest some thing