I don't usually sync media content to my Touch Pro and was unable to get any of my existing playlists to show up in the TF3D music tab. The newest release of PlaylistMgr fixes that. Just open an existing playlist and then go to "HTC Audio Manager" in the File menu and click "Save Playlist As". PlaylistMgr will save the playlist in the correct format & location. The next time you open the music tab it will scan and update your playlist information. I was using previous a previous version on my Mogul and really like it for editing/managing playlists. Link is below if any are interested:
http://mobile-sg.com/ppc/apps/?p=PlaylistMgr