RandomFill is a freeware program that you can use to randomize the collection of mp3s that can be sent to your media player. The most important feature of this program is that it can assign weights to folders. It means that you can set each folder to be either often selected from, rarely selected from or never selected from. It looks for mp3s in the scanned folders or playlists and copies them for downloading to your portable player or creates playlist for your software player. You can also set the number of mp3s selected to a maximum size of them or maximum playing time.