Cream margarine and sugar; add well beaten egg yolks. Roll wafers, add 1 1/2 c. crumbs to butter and egg mixture. Drain juice from pineapple and add enough water to fill cup. Dissolve Jello in 1 cup boiling water. Boil pineapple mixture (juice and water) and add to Jello. Add all this to butter mixture. Add beaten egg whites last. Line a buttered pan with half of remaining crumbs. Pour mixture in pan and put rest of crumbs on top. Refrigerate.