2. SPRINKLE gelatin over milk in a small saucepan. Let stand 5 minutes or until the gelatin has “bloomed” and is starting to absorb the milk. Heat milk over low heat stirring constantly until the gelatin has dissolved completely, about 1–2 minutes. Allow to cool slightly. Cooling too much will cause the gelatin to set. If this happens, simply reheat and allow to cool slightly.
3. BEAT cream cheese and SPLENDA® Granulated in a 12-quart mixing bowl using a paddle attachment until smooth. Scrape sides. Gradually beat in sour cream, lime juice, lime peel and rum extract. Scrape sides and beat in gelatin mixture. Refrigerate 15–20 minutes or until mixture begins to thicken. Stir frequently.
4. STIR chopped mango into gelatin mixture; spoon into pie crust. Chill until set, about 1 hour. Garnish individual servings with mint sprigs and mango slices.