phred was also so kind to supply me with a presets file that works with MB's (custom) presets directory. Some personal notes you may want to take into consideration:
• The supplied presets file is not up-to-date. Still useful, but don't be upset that some stations are "dead".
• You can update the presets file yourself, but only outside MB. You can use a dedicated XML editor or just a plain text editor. Just keep the format intact. MB doesn't have the functionality to maintain the presets file.
• You can put the presets file anywhere you want. The location is stored in MusicBeeSettings.ini (look for <PresetsFilePath>). If you later decide to re-locate or load another presets file, just remove the current presets file. After restart MB just asks for the new location.
• The Station Directories, including the Presets, are not a replacement for a personal (play)list. Directories are a way to explore and discover stations. Hopefully there will be more added in the future.
• Because of the lack of a playlist feature or search/filters as with normal music files, it is very tempting to use the customisable presets file.
• You can save your favorite stations to the library by double clicking the selected station in one of the directories.
• This "playlist" is maintainable. You can also add your own stations to it. Just right click and you'll see what you can do.
• You can export and import these lists. That way you can build up your own catalog of playlists. But this would be outside of MB.
• The big downside to all this is, that the exported (opml) file doesn't preserve all fields. See also http://getmusicbee.com/forum/index.php?topic=13473.msg81141#msg81141