pfm files are Type1 Postscript Fonts. There are two files required to install:

yourfont.PFB - postscript font binary data

yourfont.PFM - postscript font metric data

On Windows XP, you can simply drag TrueType Fonts (.ttf) into the C:/Windows/Fonts folder to "install" them. I'm not sure if you can do this with Type1 fonts if you have both files because I only have the .PFM file and this didn't work. Websites suggested dowloading Adobe Type Manager Lite, a freeware font installation program at www.adobe.com. I attempted to install the font by selecting FoundryMonoline-Bold.PFM and it promped me for the location of the FoundryMonoline-Bold.PFB file. I didn't have it so couldn't install it. You must have both files.