so my plan was to replace old DIVX+MP3 coded rips with new XVID+audiocopy ones. Everything seemed fine until I tried the vista media centre interface then i got " one or more codecs missing... cant play the file"

But outisde of the media centre interface, I can open the video file with windows media payer - it pauses to say acquiring codec...codec acquired.. then plays the clip OK.

but not being able to use the media centre interface is a show stopper.

anyone know of a fix ?

NB the codecs are all on the pc, because as I said the file will play in WMP & also in zoom player & VLC player.

the audio pass thru in this instance is AC3, I don't know if vista is unhappy with that or unhappy with XVid, until I do more testing :-(