Howto Install TrueType Fonts in Linux
tar zxvf truetype.tar.gz
rm -rf truetype.tar.gz
chkfontpath -a /usr/share/fonts/truetype/
fc-cache ( you may have this or not depending on distro )
restart xfs services: /etc/rc.d/init.d/xfs restart ( again depending on distro )
Now you should be able to change the default font on say firefox to use verdana or whatever default font you like. You may have to restart firefox if you already had it open, I had to.