How to rebuild LiveCD

[Sdävtaker <sdavtaker@xxxxxxxxx>]

Hello,
I had installed DFBSD and a couple of basic apps through pkg-src in a 
4GB HD and want to move them to a LiveDVD (or CD, actually im not using 
the 4GB, just 900MB and can maybe do some extra cleaning).
I was wondering if someone can point me to some documentation of how to 
create the LiveCD.
Thanks for any info.
Sdav