The Library Paths section of Forest Pack and RailClone's Library Browser holds the location of the different libraries. The user can add manually their own libraries under File - Preferences ... Library Paths section and by Add... the path where the .xml files are stored. Or you can add them manually to the user’s registry:
[HKEY_CURRENT_USER\Software\Itoo Software\Forest Pack Pro\LibraryDir]
[HKEY_CURRENT_USER\Software\Itoo Software\RailClone Pro\LibraryDir]
Also, it could be defined globally in following system registry
[HKEY_LOCAL_MACHINE\Software\Itoo Software\Forest Pack Pro\LibraryDir]
[HKEY_LOCAL_MACHINE\Software\Itoo Software\RailClone Pro\LibraryDir]
One of our users has written a maxscript to add directories to the library automatically which you can find here
, we haven't tested it but you may find it useful.
I hope that helps, please let me know if you have any further questions.