1、 Open the ipod_control folder then open the music folder. Copy each one of those folders (should look similar to these: F00, F01 ...) onto your computer.
You can do this by creating a new folder on your desktop and dragging the files into the folder.
2.Open itunes and insert the new folder you created on your computer's desktop into: library ---> Music
3.You can now sync your ipod to this new computer with out losing all of your music.
More Reviews about iPod Music to Computer:
For PC:How to transfer and backup music/songs from ipod to pc
For Mac: How to transfer or backup music/songs from iPod to Mac