I think we are talking about two different things...
I like your idea of split shared file, inside "SharedFiles" viewing, into a sort of categories.
Anyway, i'm about the search section: if you try to search a file, and one of the found source is a shared file and another one is a downloaded files (one whihc you've downloaded but now is no more shared), they are all marked in green, and that's not funny... I remember emule does mark with different colours, but don't remember which one...
Bye