Would it be possible to seperate AudioBooks and Music into two seperate menu items?
Sorry about the lack of literary interest in thios post, but it is 2 in the morning, so bah shucks to you.
Use a media subtype to differentiate them. You can use the Media Files/sync feature in the web admin to set a media sub type and format to each file.
You can then filter them in the orbiter's view appropriately.
-Thom