In medium sauce pan melt the margarine. Remove from heat and add water and Splenda. Stir in graham cracker crumbs and mix until thoroughly combined. Press onto the bottom and sides of an 8 or 9 inch pie pan. Bake at 400 degrees F for 6-8 minutes until deep golden brown. Cool. 8 servings - 70 calories.
Little tip: For a more moist crust omit the baking and simply chill the crust thoroughly.