Spray a 9X9 inch baking dish or 6-cup Jello mold with nonstick cooking spray.
In a medium glass mixing bowl, place both jello packages and unflavored gelatin (1/2 envelope). Add boiling water (1 cup) and stir continuously, for 2 minutes, until the jello and gelatin are completely dissolved. Add cold water (1/2 cup) to the mixture.
Add the pineapple along with juice (1 can), the cranberry sauce (1 can), chopped pear, and chopped walnuts (2/3 cup). Stir mixture until evenly mixed.
Pour into prepared mold, cover with plastic wrap, and refrigerate until firmly set.
Meanwhile, in a large bowl, beat the cream cheese (1 package), lemon juice (4 tablespoons), lemon zest, and 1 cup of sugar until the mixture is smooth.
Fold the Cool Whip (1 container) into the cream cheese mixture until just incorporated. Refrigerate it until firmed up enough to neatly spoon in to the Jello center.
About an hour before serving, invert the jello mold onto a serving platter. Allow it to sit and the jello will release onto the plate.
Fill the center of the Jello mold with lemon cream topping or serve in a bowl on the side.
Garnish with fresh whole cranberries or sugared cranberries, lemon zest, and fresh mint leaves.