These ebuilds come from http://git.overlays.gentoo.org/gitweb/?p=dev/dev-zero.git;a=summary.
If you have some problems, go to the official site first.
dump : Dump/restore ext2fs backup utilities ( http://dump.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 dev-zero
For Paludis use this rsync : rsync://gentoo.zugaina.org/dev-zero-portage
If you have a problem : ycarus(-at-)zugaina.org