Exclude parts of the music library from albums/artist/genre lists

Hi,
my name is Marius.

I'm using Squeezebox with an own server for quite a long time now.
But there is one thing that has bugged me ever since:

Part of my music is perfectly organzied, the other part is a mixture of single files that are a mess.
Sadly that means that all the views for albums, artists and genres are totaly mixed-up.
I would love to be able to exclude the unmatched songs from those lists while still beeing able to search for them by text-search.

I guess that's a problem that many people are facing...
So i wonder if anybody found a solution for this?

The organized files are in different folders than the unmatched ones...

Can you help me?

Greetz Marius