Building own installer DVD with customized packages bundle

[Nyoman]

Hi,
I want to build a DVD for release 5.3, so that I can have
bunch of packages in just one installer media.

I have read this two articles:
http://www.freebsd.org/doc/en_US.ISO8859-1/articles/releng/index.html
http://www.freebsd.org/doc/en_US.ISO8859-1/articles/releng-packages/index.html

so far the basic ideas that I grasp are:
- to make the list of 'wanted' packages, I should use as reference:
   src/release/scripts/print-cdrom-packages.sh
- do the actual splitting of the packages
   (that is, to only 1 DVD and 'scratch' directory),
   using the scripts available at ports/Tools/scripts/release/
   as base/reference.


but i have no experience before with creating ISO for FreeBSD,
so I want to know,..
- how do I incorporate the newly 'splitted' packages to the
   FreeBSD installer CD (i.e Disc 1 of 5.3 RELEASE)
- what else should I consider?

thanks a lot,
regards,
Guido