3 pkgs. 8-oz.each non-fat cream cheese 1 1/4 cups sugar 1 cup nonfat sour cream 1 tbsp.flour 2 lrg.eggs 2 squares semisweet chocolate,melted For the crust 1 cup chocolate wafer crumbs 1 tbsp.butter melted 2tsps.vanilla Preheat oven to 325 f.To prepare crust,in a small bowl,combine crumbs and butter.Press into a 8" springfoam pan. In a lrg.bowl,using an electric mixer set on med.beat cream cheese and sugar for 2 mins.Beat in sour cream,flour and vanilla.Add the eggs,1 at a time beating well after each one. Transfer 1 1/2 cups of batter to a small bowl.Stir in chocolate.Spread half of vanilla batter over crust.Top with half of chocolate batter.Spoon remaining vanilla batter over chocolate batter.Top with remaining chocolate batter.Using a knife,gently swirl batters together.Place pan in a shallow roasting pan.Add enough boiling water to come half way up sides of springfoam pan.Bake until just set about 1hr.15mins.Place pan on a wire rack and cool to room temp.Cover and chill about 4 hrs.