You can use my playlist converter, it allows you to create playlists with Winamp, Windows Media Player or any other player that can save in M3U or PLS format, and then you can transfer and use the playlists on the M6. Check my signature.
Just don't ask for Unicode support (special characters), i'm too lazy to code it at the moment, plus i don't need it myself, and i just barely got my second M6SL today, as the first one's USB port broke 3 months ago.