In a bowl, dissolve strawberry gelatin in boiling water; stir in cold water. Pour into a 13-in. x 9-in. x 2-in. dish coated with nonstick cooking spray; refrigerate until set.
Meanwhile, in a small bowl, sprinkle unflavored gelatin over cold water; let stand for 1 minute. In a saucepan over medium heat, heat cream (do not boil). Add softened gelatin; stir until gelatin is dissolved. Cool to room temperature.
In a mixing bowl, beat cream cheese, sugar and vanilla until smooth. Gradually add the unflavored gelatin mixture; mix well. Carefully pour over the bottom layer. Refrigerate until set, about 1 hour.
For top layer, dissolve strawberry gelatin in boiling water; stir in cold water. Cool to room temperature. Stir in strawberries; carefully spoon over middle layer. Refrigerate overnight.
Note: This salad takes time to prepare since each layer must be set before the next layer is added.