First of all sorry if this has been covered but searching didn't turned up with anything useful. Soo my situation is the following: I have a 8GB iPod Touch 2G 2.2.1 Jailbroken and now want to update to 3.0 Jailbroken. So far so good. However my iTunes Library exceeds the space on my iPod by now so my iPod holds only a custom selection of songs out of my entire library. Is it possible too remove all songs from my iTunes PC library that are not on my iPod by a button click or so? This would be very helpful after upgrading to 3.0 since I wouldn't need to sweep through my entire library again. I'm aware that you can just backup and restore your iPod in iTunes but I'm afraid it will mess with all the Cydia apps, etc. Thanks for help in advance!