I managed to play one single file with a .wpl file.
I made a .txt file on my computer and just put this inside of it:
/MUSIC/YTD/Bustin.mp3
/MUSIC/YTD/Dango.mp3
Then I saved it. And changed the file extension from .txt into .wpl
Then put the .wpl file on the root of my SD card.
So I tried to...