Set your player to MTP mode and attach it to your computer with the included USB cable.

Open the file browser and then click on the icon for your player (mine says Philips).

Once your in the window inside your player hit control h (Ctrl+H) (hold the control button and press the "H" key) to show your hidden files.

Right click in the window and select the "Create Document -> Empty File" option.

Name the file: .is_audio_player

Now open the file and paste the following text in it:

audio_folders=Music/,Recordings/

video_folders=Video/

output_formats=audio/flac,audio/mpeg

These are a list of directories for the programs to put your music into and a list of the file formats your player supports. I have only included flac and mp3, but you can add others by looking up the mime type syntax (ex wma = audio/x-ms-wma etc).

When you're done, save your file and eject your player.

Let your player update and then plug it back in to your computer.

Open Banshee or Rythmbox and you should see your player mount.