With this script you can install a font (or more than one) just by left-click it and selecting ->Scripts->InstallaFont
In order to install the script:
1- download it
2- give it executing permissions:
chmod +x InstallaFont
3- copy it into nautilus script folder
(Just replace yournick with the nick of your user of course..)
In order to install the fonts this script requires the root authentication.