Dissolve raspberry gelatin in 2 cups boiling water. Pour into a 9 x 13 x 2 in dish; Chill until firm
Sprinkle unflavored gelatin over 1/2 cup cold water in a medium saucepan; let stand 1 minute. Cook over low heat, stirring until gelatin dissolves.
Combine half & half with sugar in a small saucepan; cook over low heat, stirring until sugar dissolves. Combine this with the unflavored gelatin mixture, vanilla and cream cheese in a large mixing bowl. Beat until smooth.
Gently pour cream cheese mixture over first layer of salad. Cover and chill until firm
Dissolve blueberry gelatin in remaining 1 cup boiling water. Stir in blueberry pie filling.
Gently pour pie filling mixture over first two layers of salad.
Cover and chill at least 8 hours or until firm. To serve, cut salad into squares.