Hi Morne,
Library paths are stored (& can be edited/added) in the system registry under the
HKEY_CURRENT_USER\Software\Itoo Software\Forest Pack Pro\LibraryDir
key, At the moment, the recommendable way of "copying these" would be by using .reg files.
For rendering purposes, 3ds max is looking for assets such as maps within paths listed within the Customize > User Paths > External files list. The Forest Pack plug-in runs a "Collecting maps" process searching in all its library paths for folders with the name "maps" and these are automatically added to the aforementioned External files list.
However, that's not the case of render nodes, where the plug-in isn't "launched". So for these, it's possible to copy the 3dsmax.ini file with correct paths to all of the computers on the farm. Just a note on that however: apart from the [BitmapDirs] section there are several other 3ds Max settings saved in the 3dsmax.ini file, and not always it would be a good idea to replace them with "another computer settings". Anyway, if these computers are always used just as render nodes, there shouldn't be any problem.
I hope that helps,
Paul