rentonhighlands

I am recording school lectures with my ipod using italk. I want to post them to my website for other classmates to download but the files in .dvf file type are hung. Most of the lectures are 3 hrs long. I can play the files in media player with the sony plug in. Can I use media player to convert the files to mp3 as well? Also if I can not find a way to convert .dvf to mp3 can I convert the files to somthing else. I want to make the files small.