How to install fonts intructions from the (excellent) searchfont.com webpage, modified for a better reading experience.
Download and unpack/unzip the font file in a folder that you decide or on your desktop.
Then follow these steps
Right click the extracted font file (.ttf or .otf) and click properties
Under the General you will see Unblock button Click on it(Ignore this step if there is no Unblock button and continue to steps 1 or 2.
Right click the extracted font file (.ttf or .otf) and select Install
There several methods:
In XP you can reach the Fonts folder by clicking Start>Control Panel>Appearances and Themes and clicking Fonts icon which is located under See Also
In prior version of Windows you can reach Fonts folder by clicking Start>Settings>Control Panel>Fonts
Double click the Dowload button and save the font zip file on your hardrive. Unpack the font file using Stuffit Expander. If you are using Safari as your default web browser it will automatically extract a zip file and save it to Downloads folder.
Before installing fonts, you should close any open applications. For some applications, new fonts do not appear in the font menu if you install them while the application is open.
Double click on the font file you just extracted. This will open the font so you can preview it and if you like the font click Install Font. This will automatically install the font and you will able to see it in the Font Book.
If the above instructions do not work just drag and drop extracted font file into the Font Book which is located under applications.
Copy the extracted (.ttf or .otf) font files into fonts:///
INSTRUCTIONS FOR PFB FILES
How to install fonts for PBF files
These is a type 1 font script extension for Adobe proprietary True Type .
"Adobe® Type Manager® (ATM) is a system software component that automatically generates high-quality screen font bitmaps from the PostScript® outlines in Type 1 or OpenType® format. With ATM, you can scale your fonts without the characters appearing jagged, and you can also enable "font smoothing," which further improves the appearance of your fonts onscreen by using your computer monitor's color palette to intelligently improve the rendering of characters. ATM Light also allows you to print PostScript fonts on non PostScript printers, and can be used to create custom instances of multiple master fonts."