Thanks, Jim.
I know that interoperability is a challenge, especially for smaller software houses like yours.
Still, at this stage I have invested as much time and effort as I am willing to invest into ID. I have a family and other things to take care off, and I am not optimistic that the other challenges I had described can be solved and stabilized. One reason for this are comments from you like "Attaching a USB drive to the Id is a safer solution", and similar ones you made to in responses to my post. I made a pro-ID decision based on described features. I don't want to change my complete home set up because features of the ID are not stable or the interoperability is not working as described. Music is the passion that lead me to ID, not networking.
The unresolved issues can be found by looking up my profile and looking at my posts.
I will continue using MC on my PC for managing my music, for that MC is the best on the planet. But for networked playing, I will look at other solutions, possibly extending my 'trial' Sonos set up, which just works like a charm since the minute I put it in, or go back to the hated-loved Apple set up.