Not that I was slaying them or anything, so take this for what it's worth.. but I did catch a few steelhead last year on jigs when I tipped them with little chunks of cooked prawn. Large size prawns, $8 a bag, 1 prawn equalled 4 chunks.
Point is, cooked worked. I know this makes me kind of a nancy, but I would really rather not have to deal with bright red dye on my hands in the winter.
I caught a couple of coho last week on a jig tipped with cooked prawn on the Vedder. My fresh chum roe/Pautzke's Red wasn't doing much that day, so I tried the only other thing I had in my vest.. worked. I guess cooked prawn worked for them that day too..
But back to your original question.. the guy at SeaRun told me to sprinkle a little Pautzke/procure in a ziploc with the prawns when i was fishing, said that's how he did it and it works great. I tried it once, didn't catch anything and really didn't like the mess.