anybody can help me to Customize CD?

[fei wang <peter.uboot@gmail.com>]

Hi all,
   Recently, I have a desired to customeize ubuntu install CD to fix
my paticular requirement
that is  aim to porting ubuntu to the minimize Embedded hardware
platform. Through  scraching the ddistribute ubuntu CD,
I found ubuntu using the debian installer as its install processing
manager. But the detail of how
debian installer to select necessary deb package during install
processing confuze me for a week.
Can any debian installer develper help me? any suggestions as good.
Thansk a lot.

Peter.wang