CAA: Christian Anime Alliance

Hmm... Yes, my dad got Napster, which I have been using to download music. We only have one problem... playing said music. The music that's downloaded only likes to work in Napster's cruddy mediaplayer even though it's WMA format, which other players (Winamp for example) know how to play. However, Winamp gives me some stuff about needing a Napster decoder. It told me that it would be able to play the music if I installed Napster... Naturally I have already done that.

I was wondering if it's possible to convert these WMA files from Napster into something like MP3. Any help?