[peteraugusts]

Right click on the song you want in itunes and go to options cut the time down to what 20 seconds you want click get aac copy. take the copy and drag it to your desktop. the file extension should be .m4a change it to .m4r and double click should put it in itunes ringtone folder. or download the free ringtone converter google iringer.exe

I also want to convert to mp4 so I have tried this.It easly convert to m4r.no problem at all.