Hello Elizabeth,
I think Bernie is right to suggest you get organised BEDFORE making your Playlists and the KN SD Explorer Tool would be the easiest and quickest way to get all your SD Cards sorted BUT, the downside is I don't think you can purchase this now as Fred gave up the production sometime ago.
However, if I were you I would check with him first, he may be able to help. The email address I have for him in my address book is:-
f.mellink@chello.nl
It's worth a try as it will save you hours of work.
Good luck!
Audrey