I would not mix add-on fonts with system fonts (you might lose them with a system upgrade).
Easier? Try this:
mkdir -p /usr/local/share/fonts/TTF
<copy the font files to here>
That gets them ready for use -- note, you can use whatever name you like in place of TTF
both here and below. You can, while you're at it, copy all extra .ttf files you have available into this same directory.
Then get into /etc/fonts
and create a file, local.conf
that looks like this:
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!-- /etc/fonts/local.conf file to configure system font access -->
Once that's done, the system knows where to find those fonts (you can add additional font directories in /usr/local/share/fonts
And you're good to go.
Hope this helps some.