Hi neldared
If you are running Mac OS X, just drop the font in the Font Folder which is in the Library Folder on the hd, and when you open Quark the font should be available.
Also with OS X you can double click the font and a window will open asking if you want to installl the font, click OK.
I suppose on a PC you also just load the font with the rest of the fonts and it will be available when you launch Quark.
Hope this helps
IMacQuark