Depends on what kind of file the phone uses. If it used MP3s, just crop the song to 30 seconds and 64kbps VBR using iTunes, and transfer the file over. If not, go find different ringtone software. iTunes never claimed to be ringtone software, and honestly its a ridiculous expectation to think that Jukebox software would make ringtones, and not to mention its Apple, which means the love exclusivity and $.