These ebuilds come from http://overlays.gentoo.org/proj/sunrise.
If you have some problems, go to the official site first.
furiusisomount : Simple Gtk+ Interface to Mount ISO, IMG, BIN, MDF and NRG Image files without burning to disk ( http://www.marcus-furius.com/?page_id=170 )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a sunrise
For Paludis use this rsync : rsync://gentoo.zugaina.org/sunrise-portage
If you have a problem : ycarus(-at-)zugaina.org