There is more than once place to put fonts in Mac OS X.
•Putting fonts in the Mac OS X>Library>Fonts folder will make them available to everyone.
•Putting them in the Mac OS X>Users>user folder>Library>Fonts folder will make them accessible only to a specific user.

BUT if you have lots of fonts I recommend using a font management program.

Save the font first:
Save the font to an easily navigated to directory, E.G.: the root of the hard drive:  c:\ [double click My Computer, double click C: and save]

Install the font:
Go to START, CONTROL PANEL, FONTS
---open the fonts.
------click FILE drop-down-menu, choose “Install New Font”
--------find where you put the font—it will detect it and show it in the upper left window, called ‘list of fonts’.
---------make sure you have checked the box in the bottom center, ‘Copy Fonts to Font Folder’
----------highlight the font shown and click OK.
You are ready to go-it will show up in the drop-down-menus of all text editors that use TTF (true type) fonts