Thx to both of you for the answers.
Indeed there a few distros that offer this (ubuntu, salix.org, topasnet.ch and maybe others) but i would like to stay on Sabayon if possible.
I read the molecule wiki a few times, and from what i understand, one can only add files to a list to add on the distribution iso. But its not a "clone" or "snapshot" of an installed system. Unless i have misunderstood the wiki, molecule will not help me here.
Im actually hoping deep inside me that someone with greater knowledge than i have, will look at the topasnet.ch site and "transcribe" the scripts this guy created to be used in Sabayon.
the same with the pretty nice looking "remastersys" of ubuntu, which claims to be able to make an iso out of an installed and running system!