I wish I had the answer to this, too. On MusicMatch, you could set a complex series of parameters and the program would pick songs for you. For example, I could request 90 minutes of music, only hard rock or heavy metal, only songs rated four or five stars, but not any music by Megadeth. MusicMatch would instantly create a playlist based on your criteria, perfect for those with huge music collections. If there is a player out there that will do this, please let us know.