If I were clever and/or resourceful, I'd go to
www.google.com and search for the terms 'live' and 'linux'.
Then I'd read the list of sites that it found, and realize that the first five are for existing linux live distros, but the sixth one (
http://www.linux-live.org/) discusses how to build your own linux liveCD from an existing distro.
Enjoy!
--- Cerbere