Hi
Join the Club
Which distro are we talking about...?
This is important, because some of them offer customized tools to build a live version... ( Knoppix, Kanotix, Debian Testing, and Fedora ( IMHO... ) )
I am trying to to the same, in Arch Linux...
This is a distro targeted to users which "know their way around"... if you understand the idea... but it offers a tool to create customized live versions of their installed systems, selecting packages, data, documents, etc. to be placed in their Live medium... it's called ArchIso.
You could also try Slax, it is a Slackware based distro, 32 bits only, which allows you to build your own Live version by selecting the ppackages you want... and If you are knowlegeable enough to that, it allows you to build modules to be installed in your personal slax distro out of slackbuilds for Slackware, or you could create your own slackbuilds, create 32 bits packages out of them and convert them to slax modules...
... too bad there is no 64 bits slax...
BRGDS
Alex