Thanks this is great info.
Too bad it doesn't work for the microSD (external memory). Unfortunately you still must use Yahoo to add Playlist to the microSD Card.
Here is a quick how too.
Open Yahoo Music Jukebox. Import your MP3's or WMA's to the music library. You can also use YMJ to rip your own music, which will rip it and automatically add it to your library. If you have the Yahoo To Go Music Service you can have it download music to your library, which can also be transferred to the SL2's internal or external (microSD card).
Once you have all your music imported;
click on file/create a playlist (you see new playlist appear) now type the name of your playlist
Go to your music library, drag and drop all the songs you wish to add to this playlist
Now take the playlist and drag and drop it to the SL2's external memory (this will load the files and create the playlist)
You can also use this same procedure to create a playlist on the internal memory.
One little side note, after you shut down and restart your SL2. You'll notice the playlist shows up in the list under the internal memory even though you initially dropped it to the external memory. Apparently what Yahoo Music Jukebox does is setup the playlist and tell it where to find the files on the microSD card. Regardless it does work.
By the way there is also a way to reorder your playlist if you decide you want them in a different playing order. (Windows Vista)
Open My Computer (Windows Explorer)
Click on Stiletto2
Click on Internal Memory
Click on Playlist
Double Click on a Playlist.
Now it will open and you can change the order of the list.
When your done close the list.
Now when you open the playlist on the Stiletto it is reordered in the way you have changed it.
I hope these little tidbits help!
By the way I am going to make this a sticky!