I intend to buy one of the Harken systems for my PA14 as soon as my deck gets remodeled. Here's the link to all their products... http://www.harkensport.com/cat/hoister.html

Maybe suspend it in a cargo net?

I actually went up into my attic and laid in 2x4 to make a bigger and stronger area for support then putting the screws for my pullies strait into the end of the 2x4 which was already in there under the drywall

When I had a PA last year I was searching the Hobie site and saw a guy had a system alot like yours but he had some kinfd of electric motor attached. And if im not mistaked another guy used an electric drill motor to spin his up. Sorry I dont have the link but I know I read it and saw the pics.

Many different ways to do it and I will update pics when I profect it. I just needed to get it off the ground. Just hope the way Ive done it doesnt hurt my kayak. I hope andy can come in with his expert advice.

The PA storage rack I built
 

I used an old canoe trailer for $275 and got hobie cradles for the PA - it is also a knotless, truck free version that requires minimal lifting...and can be pulled downhill by a motorcycle...

I don't have a PA so not sure my setup would work in your case but i'll share to at least give you some ideas. I bought a couple of the harbor freight bike lifts and they work great for my revo, that is with a couple of modifications. Here is a pic of my revo hanging in my garage.
http://i1003.photobucket.com/albums/...726_171303.jpg

So basically i just put up a couple of 2x6's between my rafters and mounted the bike lift to them. Here's a pic of them.
http://i1003.photobucket.com/albums/...726_171310.jpg

There are a couple of necessary modifications to make the bike lift work for a yak due to the increased weight. You will need to replace the cheap plastic pulleys with higher quality metal ones. I found a couple at home depot and they were pretty cheap. I also replaced the rope that came with the bike lift with some climbing rope.

Another thing I did to make lifting the kayak easier was buy a second bike lift and mount another pulley to one of my walls. This really helped and putting my kayak up takes less than a minute. Here's a pic of this pulley.
http://i1003.photobucket.com/albums/...726_171316.jpg

If you have any questions just let me know. I hope this gives you some ideas.