brother-mfc7860dw-cups : CUPS driver for Brother MFC-6490CW ( http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html )
brother-mfc7860dw-lpr : LPR driver for Brother MFC-6490CW ( http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a np-hardass-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/np-hardass-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org