If it was another packaging system you were looking for, as opposed to
specifically wanting to install Gentoo, why not have a look at Slackware?
Slackware specific packages install with pkgtool, every thing else is
compled from source, (usually, > ./configure >make >make intall).
Some find it difficult to begin with, but if I can manage to get it up and
running, I'm sure that the vast majority of those subscribing to this
list, can have a working installation in a shorter time than it takes me!
--
John Seago