At first I didn't understand this question but now I do, including Fred's answer. It may be similar to a question that I had floating around in my head.
My question is: instead of using the Playlist feature, is it possible to create what I will call a "Favorites Bank" where one can copy selected individual button numbers from various unloaded banks? It sounds like this is possible by simply loading in each source bank, choosing the source button you want to copy, then load in the target "favorites" bank and Memory save it in your target "favorites" bank? Keep doing this until you have your "Favorite Bank" filled up.