For Crust, combine gingersnap crumbs, 3 tablespoons Equal and melted butter. Reserve 2 tablespoons crumb mixture. Press remaining crumb mixture onto bottom of 9-inch springform pan. Bake in preheated 325F oven 8 minutes. Cool on wire rack while preparing cheesecake.
For Cheesecake, beat cream cheese and 1 cup Equal in mixing bowl on medium speed of mixer until smooth and well combined. Mix in eggs, egg whites, cornstarch and salt. Fold in sour cream and vanilla until combined. Gently stir in cranberries and orange peel.
Pour batter over baked crust. Sprinkle with reserved crumb mixture. Bake in preheated oven 45 to 50 minutes or until center of cake is almost set. Cool on wire rack. Gently run metal spatula around rim of pan to loosen cake. Let cheesecake cool completely. Cover and refrigerate several hours or overnight before serving. To serve, remove side of pan. Garnish top of cheesecake with grated orange peel, if desired. Cut cake into wedges.