Limeire + album art + mps player= PROBLEMS...HELP!?

ok, so i download almost all my music from limewire. then i transfer it to my music files and copy it to my media library in my mp3(creative zen- the little one) the problem is every single song has the album art of the wrong artist!!! i have loretta lynn songs coming up with the ludacris cd cover. and patsy cline is showing hendrix....help please i have no idea how to get the art out!!