Loading fonts outside of the font directory

Is it possible to use a font not located within \Windows\Fonts? I haven't gotten to this point yet but I'm worried about complications that might arise trying to write or update fonts in this directory from an installer.

Does anyone know if writing to this directory from an installer will be a problem? It just seems to much simpler to use a local folder to hold my fonts.

There is no problem with installing fonts to this folder.
You can't use a font which isn't located in this folder.