Loretta, I too thought that the Nichol's instructions seemed to apply only to the aluminum basket. That's why I ignored them initially.
However, when I put the Barnett plates in my stock steel basket with the two driven plates at the bottom of the stack, the outer drive plate tangs were too close to the top of the basket and flopped right out when the clutch was actuated. Only when I switched to the Nichol's method did the plates seat deeply enough so that the pushrod wouldn't push them right out of the basket.
So I suggest that you do the same as I did and use the Barnett supplied instructions' sequence, but with the Nichol's change (two plates on the outside not the inside).