in a small pot, melt together the 6 ounces dark chocolate and 1/2 cup whipping cream. stir until just melted and no lumps remain, remove from heat. pour into your crust shell and allow to cool as you make the next layer.
in a mixing bowl, combine 1/4 cup whipping cream, softened cream cheese, peanut butter and brown sugar. mix until light and fluffy. add in vanilla and the remaining 1 1/4 cup whipping cream and beat until peaks form. spoon over the chocolate layer. cover and freeze for several hours.
allow your pie to slightly soften before serving. sprinkle on more chocolate, chopped peanuts and drizzle with chocolate sauce.