i am waiting for my cds to come in the mail
you can't convert mp4 itunes-type formatted music.... not until someone finds out how to.... if you havn't updated your itunes software in a looooong time... there is a program... but until then, don't update your itunes.
one thing you can do though is burn them onto a music cd, then rip them in a different format... a lot of work, i know....
you can use WINE, an app that lets you run windows programs on linux... maybe that will help?