perhaps there shout be a "random,shuffel,normal,never" meaning:
RANDOM all in this directory and sub dir shout be random (as one playlist)
SHUFFEL all in this director are playe random (sub dir are playe as one file)
NORMAL all in this directory are played in sequens (sub dir are playe as one file)
NEVER this dir is always played in sequens regarding topdir

and for each dir an variable (4/10) that tels howe fare you are in the sequense, so it continues form were you were last.

Mark
wait for mk III with a USB Host/slave
(USB->Ethernet)(USB->COM 1-8)(USB->You name it)