Yes, specifically uncomment the
PORTDIR_OVERLAY=/usr/local/portage
line in /etc/make.conf.
Then, ensure you have that dir and the subdirs in which to place the ebuild:
e.g.
/usr/local/portage/net-www/aolserver/
in which goes the aolserver-4.0_beta8.ebuild
etc.
The only tricky one is the nssha1 one, in which you have to make
/usr/local/portage/net-www/nssha1/files/
and put in that the diff nssha1-0.1.diff
in addition to putting the ebuild in nssha1/
Often, additionally, although sometimes portage will detect ebuilds in your overlay dir from anywhere, it sometimes helps to run emerge <ebuildfilename> while in the ebuild's directory, if for some reason portage can't find your newly downloaded ebuild. Give that a shot.
Hope that helps!
Good luck!
