I forget the name of the move, but you ribbon spread the deck face-up on the table. Insert each card one at a time into diff parts of the deck, but when you square up the deck they are on top. The reason is because when you inset the card into the deck, you slide it slightly to the right so that it is actual not in between the cards, but underneath the deck. Leave it outjogged until all 4 cards are placed in the deck. Then push them in one at a time and square up the deck. The 4 cards will be on the top of the deck.
If anyone can name the technique that would be most helpful!