Never answered: importing multiple playlists into iTunes?

If you import a folder that contains playlist files they will all be imported, however they are imported at the top level and not organized into folders. iTunes can export the whole library as an XML which can reimport with the folder structure, otherwise you can export and import individual lists.

I have a script that can import m3u files called ImportM3U which does what you'd expect, and another called ImportFolderStructure which recreates the layout of files stored on disk as a set of nested playlists and playlist folders. Between the two of them should be most of the building blocks you would need to export or import a playlist folder and all of the regular playlists contained within. What you would need to do is decide where to store the path information in exported playlists. A custom comment, e.g. #PATH:\Folder 1\Folder 2\Playlist, as the second line of a .m3u8 file could be used to record the path in an export script and recreate it on import.

tt2

As noted those scripts contain the building blocks that would be needed for your project, indeed if you have a set of nested folders that contain playlist files then the second one can import all of the .m3u/.m3u8 playlists in that folder structure and create the nested playlist folders around them.

If you can go into more detail about how your media and playlists are currently organized and exactly what it is that you want to achieve perhaps I can help.

tt2