Are you saying Rhapsody did not show your DJ? Truthfully, that is a new one... But I guess it could depend on what version of DJ youhave...
To upgrade the firmware, you need to know the following...
1.) It will erase EVERYTHING on your DJ. I'd recommened using DJ Explorer on the XP machine (step 2) to back up all of your music.
2.) It needs to be done on an XP machine.
3.) When completed, you should be able to see the DJ inside of Windows Media Player 11.
4.) Some have reported attempting t his firmware upgrade killed their player...
Proceed to the following web site and choose your version of a DJ (yes, it says Windows XP, that is okay)
http://support.dell.com/support/downloads/index.aspx?c=us&l=en&s=gen&~ck=anavml
In the screen that opens up,look for System Firmware, and select Dell Firmware.
When you select Dell firmware, a screen will open up with all kinds of information, including installation instructions. Follow those steps.
Remeber, the firmware upgrade MUST be completed on an XP machine, but once it is done, the player will be seen in a Vista machine through Windows Media Player.
If you backed up your music to a flash drive, you can une WMP to reinstall it.....
Good luck.