Adding album art to my music collection

[memory]

Is there a way to add album art to to my music collection? I am not talking about in the WMP or Itunes library, I am talking about where the music files are stored at, each individual thumbnail. Is there a free program that I can download that will do all the songs at once?

I have tried Tidysongs that was posted on here but that just does it for the Itunes library. There is a few songs that have the album art already added. I just wanted all of them to have album art.

 

[Fat.Clown]

Mp3tag - the universal Tag Editor (ID3v2, MP4, OGG, FLAC, ...) - this is what I use, quite handy

 

[Jodape]

I used that tidysong after hearing you mention it, if i go into my itunes music folder all the folders there that tidysongs found album artwork for. So tidysong would be my answer.

 

[KSoD]

I use WMP and Album Art Fixer.