The Font Drivers subkey in the following Registry path can contain references to external font drivers:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
\Font Drivers
You should not need to modify this entry directly. Your font vendor should supply an installation program for adding and removing drivers.
Driver description REG_SZ Driver filename or pathname
Lists external font drivers installed on the system. Windows NT does not include any external font drivers. The bitmap, vector, and TrueType drivers are built in and do not appear on this list.