I've seen and searched for more topics on this but sofar i'm still not able to find something which will do this.
Unless i missed it in media jukebox 8 which i'm trying now.

I have all my original CDs backuped as apes, the ape files are on my HD and just to be sure on backup CDs aswell.
Same goes for the mp3/ogg files i have, they are on my music dedicated HD but also on a backup CD...each CD having it's unique number/name

Now i want to get this organised but i would need a programm which gives me an overview of what's on my HD but at the same time it should display on which CD a certain file is backuped...

My method to find files on my backup-CD-Rs:

I burn them with Nero and let nero save compliation info files, e.g. Music001.nri., Music002.nri ... to a special directory. With Windows search function I can find the MusicXXX.nri file(s) and the corresponding CD(s) that contain(s) a certain song, all songs of a certain artist ... . For what I need this is enough.