Hi Vinnie,
I've just bought a sock from SeaTeach which may not be quite the same as as your ATN sock, but my sock is hoisted using the same halyard as the one used for hoisting the spinnaker/cruising chute. The sock has a stainless "O" ring fitted at the top to which the halyard attaches, and from that the sock manufacturer has provided a short length of line that is used to secure the head of the sail. As you hoist the top of the sock with the head of the sail also attached you hang on to the bell mouth bottom end of the sock until the sail has all but disappeared inside. The sock has an endless halyard attached within it that runs through the "O" ring at the top while at the bottom it is secured to the belmouth end and has some line to spare. Once the sail has been hoisted, the tack secured and the sheets run out around the forestay and back to the cockpit you then use that endless halyard to hoist the sock to the top of the sail. The bottom of the endless halyard needs to be made fast to the mast while the sock stays up at the head of the sail until you are fed up playing when you release the tack. Then with the same endless halyard you pull the sock back down to envelope the sail and finally head home for dinner.