Unpack them into ~/.xine/fonts directory or into xine font directory /usr/share/xine/libxine1/fonts/.
~/.xine/fonts
/usr/share/xine/libxine1/fonts/
ISO-8859-1 font ISO-8859-2 font ISO-8859-3 font ISO-8859-4 font ISO-8859-5 font ISO-8859-9 font ISO-8859-13 font ISO-8859-15 font