These ebuilds come from http://git.overlays.gentoo.org/gitweb/?p=dev/je_fro.git;a=summary.
If you have some problems, go to the official site first.
nvidia-drivers : NVIDIA X11 driver and GLX libraries ( http://www.nvidia.com/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a je_fro
For Paludis use this rsync : rsync://gentoo.zugaina.org/je_fro-portage
If you have a problem : ycarus(-at-)zugaina.org