In a large sauce pan, over medium-high heat, mix 2 cups of water, 1 cup of sugar, and 2 tablespoons of cornstarch. Stir constantly until the mixture comes to a boil, thickens, and becomes clear. Remove from heat. Add 1 package of orange, or peach, jello. Stir to combine. Place the mixture in a bowl and chill until just cool. Stir from time to time, making sure it does not set firm.
In a medium bowl, combine graham cracker crumbs, 6 tablespoons of sugar, and 1 tablespoon of melted butter. Mix until well combined. Reserve ½ a cup of graham cracker crumbs. Set aside. Press the remaining graham cracker mixture onto the bottom of a 9 x 13 baking dish.
In the bowl of your stand mixer, beat the whipping cream until stiff peaks form. Place the whipped cream in a bowl. Set aside.
In the same stand mixer bowl, whip cream cheese until smooth. Add the powder sugar and vanilla extract. Mix until combined at low speed. Fold in whipped cream.
Spread cream cheese mixture on top of the graham cracker crust. Using a spatula spread evenly.
Mix the cooled peach-orange glaze with the fresh diced peaches. Pour on top of the cream cheese layer. Sprinkle with reserved graham cracker mixture. Chill for several hours, or overnight. Cut to serve, or serve with a spoon.