(a) re-order the existing playlist randomly
or
(b) randomly order the playlist and output it to a another playlist.
The new playlist would, or course, only have one instance of each track in the original playlist.
I could then burn these tracks to a CD (or whatever) for playing in the car (for instance).
Forgive me if this question has been asked before - I have had a look in the forums but either the answer is "no, can't be done" or reference is made to some cunning feature of MM that it frankly beyond me

Heeelp!!