First make a graham cracker crust according to package directions. Then in a large bowl put large package of lemon Jello and 2 cups boiling water set in freezer to jell lightly. Meanwhile beat with mixer a large package of cream cheese and 1 cup of sugar until light. In another bowl whip one can of evaporated milk. Now whip Jello that has partially set until light yellow and foamy then beat in cream cheese mixture and then evaporated milk and pour over graham cracker crust and put in refrigerator until firm. Cut in squares and garnish with whip cream and an orange slice.