[CentOS] Created a custom/minimal CentOS 5.x install ISO

Hi all,

   I'd like to try rolling a somewhat stripped down and customized 
CentOS DVD. This is particularly interesting to me now that CentOS 5.5 
is 2 DVDs. I dare not call it a new distro as I suspect I will be the 
only one to use it. ;)

   I've been googling for ways to do this, figuring it must be somewhat 
straight forward, but my google-fu is weak it seems. Can someone point 
me to a how-to or doc on rolling your own CentOS derivative ISO? Also, 
I'm not talking about just rolling a new ISO, I can do that already, I 
want to update the list of RPMs (not)available to the installer.

Thanks!

PS - I found this link, but it's from 2006. Otherwise it's in-line with 
the kind of thing I want to do: 
http://lateral.netmanagers.com.ar/stories/38.html

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