As I said
COPY it your PC to any folder or your desktop. Then you
can change the the name of the Playlist that is on your desktop, and now
copy it back to M6. Finnaly you can delete the old Playlist from your M6.
Example:
-Connect M6 to PC and browse to Playlist folder
-Right-Click "PLAYLIST1" and select "Copy"
-Right-Click your desktop and select "Paste"
-Left-Click on "PLAYLIST1" on the desktop to mark it
-One more Left-Click to get in the Rename-Modus
-Rename the "PLAYLIST1" to what ever you want
-Right-Click on the renamed Playlist and select "Copy"
-Goback into M6 Playlist folder, Right-Click and select "Paste"
-Delete "PLAYLIST1" from M6 Playlist folder
-Done
Hope this was detailed enough
Greetz Barton