Okay, this is what I found at linuxnewbie.org:
Some fonts on the internet look pretty messed up in Linux because most of the web pages out there were written for Windows users and Window's True Type Fonts (TTF) are not included with Linux, Gnome or KDE! Luckily, Redhat 5 and newer has a Font server that will allow you to use any true type fonts on your Linux PC. Copy whatever fonts you want on an off of a floppy, burned CD, over the network, whatever and do the following:
mkdir /usr/share/fonts/ttf
cp /path-of-fonts/*.ttf /usr/share/fonts/ttf
cd /usr/share/fonts/ttf
ttmkfdir > fonts.scale
mkfontdir
Where the path-of-fonts is is of course where you copied your TTF files to. After this is done, go ahead and reboot.
I did that, but there was no change. What am I doing wrong?