Building a live CD is piss easy...

1. First read this:
   http://wiki.debian.org/DebianLive/Howto/ISO

   Which says, in just a few more words, to do this:
   # apt-get install live-helper
   # mkdir somedir && cd somedir
   # lh_config
   # lh_build

2. Get all excited, artistic, and over-ambitious.
   Plan what you want on your own live cd.

3. Read the manual page for lh_config.
   In the process above, add the options to it that
   you need to make step-2 come true.

4. Remember to always read to the end first.

5. Forget everything above and do:

   # apt-get install live-magic
   # live-magic

Have Fun!
Ron