Learn how Stripper Decks work by reading my tutorial on them from this website. The basic gist is that whenever a card is rotated 180 degrees and placed back in the deck, it will slightly protrude, making it easy to locate and control.
Reverse the orientations of the four Aces before the trick starts. This will allow you to feel them protruding throughout the deck.
Shuffle and cut the deck, being sure to end up with an Ace on top of the deck.
Starting with the top card (Ace), place the first thirteen cards in a face down pile.
Repeat Steps #3 and #4 three more times until you have four piles of thirteen.
Turn each pile over to reveal the aces on top. It will seem as if you randomly made four piles of cards from a very shuffled deck, but somehow an ace ended up on top of each pile.