Neither renaming part or lame part works on my system, when lame is running it opens dos window, since dos program and that happpens is that a dos windows is opened then close right away and all files get correct name still but without extension! and bat script dosen't work either , all i get is a error saying: "Following use of path operator instead of command parameter is invalid: "%~nI.mp3"" rougly translated from swedish, you can get lame from hxxp://www.free-codecs.com/download/Lame_Encoder.htm , it's free and legal, try it yourself, i'm using win XP Pro swedish edition, don't think that should have anything todo with errors but who knows, not me for sure!