Hi Scon,
If you want to use the worm in its full 6 inches then i've found that if you use a normal smallish sized worm hook or jig head in the front of them worm but onto your trace line you have a running swivel and attached to that another little bit of leader and a small long shank hook tied to that which you then put about half way down or slightly further in the worm and you've covered more surface area increasing your chance of hook up.
This can be a bit of a pain to rig up but when we do this we seem to get most fish (whiting, flathead, bream) on the back hook, which pays off.
When retrieving ( i usually fish these in fairly shallow water (4-12foot)) try and keep it in close contact with the bottom as thats where most fish you'll likely catch with that lure (whiting, bream & flathead) will be waiting and searching for worms and things. Try and kick up some sand to make it a bit more attractive and if you feel bites on it, then i'd get out of there as 9/10 times they are leatherjacket, the other 1/10 its a tiny whiting.
As for the jerk shads i would imagine they'll be coming out in the 7 inch in the near future.
Cheers
Josh