Having erased all my music from my Disney Pixar MP4 player and am now left with 'Empty Disc!', is it possible to down load something called 'special firmware' from the internet on to the MP4 player?

CD-RW stands for CD re-writeable. This type of disc can be written on or "burned" multiple times. However, in order to burn music or data onto a CD-RW that already has something on it, you must first erase the current contents of the disc. No special software is needed to do this, as you can do it with the Windows Media Player program, which already comes installed on all computers with the Windows operating system. Regular CD-R discs cannot be erased or reused--the discs must be labeled as CD-RW.

Instructions
Step 1.
Click on the "Start" menu button in the lower left-hand corner of the screen. Select "Windows Media Player" from the pop-up menu.
Step 2.
Select the "Library" tab in the main Windows Media Player screen.
Step 3.
Insert the CD-RW that you want to erase in the CD-ROM drive. Close the "AutoPlay" window if it appears.
Step 4.
Right-click the CD-ROM drive in the "Navigation" pane on the left side of Windows Media Player. Select "Erase disc" from the drop-down menu. This will automatically erase the contents of the disc.