These ebuilds come from http://gpo.zugaina.org/Overlays/zugaina/.
If you have some problems, go to the official site first.
supertuxkart : A kart racing game starring Tux, the linux penguin (TuxKart fork) ( http://supertuxkart.sourceforge.net/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zugaina
For Paludis use this rsync : rsync://gentoo.zugaina.org/zugaina-portage
If you have a problem : ycarus(-at-)zugaina.org