making a bootable flash drive

hi all,
i've got a standalone o/s system that boot's and run's from a cd which
is a fully operational o/s,very useful for sorting out your pc when it
dies,or just copying off your data before a format.
and i want to put it onto my bootable flash drive,i currently have a cd
rom with the o/s on it and a iso image of it too,i want to be able to
somehow get it onto a flash stick so i can use it as a fully
operational o/s as i should be able to install my own programs as i'd
have the write factor too.
i have a utility to make the flash drive bootable but it doesn't file
the o/s files on the flash stick.
any advice guys?
Thanks in advance!


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peteec