using iTunes, and all will be returned to it's former glory.
Just resync the iPod with iTunes and all the tracks will be restored.
You do Backup and Sync your iPod on a regular basis I assume.
Next time you decide to do something like that, use iRip
I tried getting my music off my iPod bussing copytoy but it has converted all my songs to copytoy trial preview. So all my songs have been cut short how do I undo this. And also can I use my iPad to convert this errror