Hey, Boondoggle. I have an ATN Tacker that I stopped using for my spinnaker. Now I use it for my hammock! Attached the spin halyard to the Tacker wrapped around the furled headsail and the end of the hammock onto the tacker. The other end of the hammock goes to the mast. Voila!
If no tacker, you can probably just use a line or webbing or something.