If you download from the app store "Ringtones for iPhone Free" (it has a blue icon with a white speaker) you can use this to create custom notification sounds and ringtones. There are other apps, this is what I use and it works flawlessly. You can import a song from your play list or use one of the many in their catalog. You still have to sync it through iTunes but the app has a little video to show you how to make and how to sync-it's really simple. All you have to do is choose a song, choose what 30sec segment of the song you want, create the ringtone(in the app), connect your phone to PC, save the song to your computer then sync via iTunes. Hope this helps.