Mix one box of Jell-O with 1 cup of hot water until dissolved. Pour 1/8 cup Jell-O in each cup. Refrigerate until set. When set, sprinkle 2 to 3 tablespoons of crushed vanilla wafers on top. In a bowl, mix second box of lime Jell-O with 1 cup of hot water and stir until dissolved. Let cool a little. In a separate bowl, beat together cream cheese and sugar. Add Jell-O mix to cream cheese, then stir in the ice cream. Gently spoon onto the cookie layer, about ¼ cup. Refrigerate until set. Before serving, mix whipped cream with ¼ cup powdered sugar until stiff and top each parfait with a dollop of whipped cream.
Note: Any flavor of Jell-O may be used for the bottom layer. For the cream cheese and ice cream layer, lemon Jell-O may be substituted.