Prepare jello as directed and let set until almost firm. In double boiler, cream together marshmallows and cream cheese. Let this partially cool while you prepare the Dream Whip as directed.
In a large mixing bowl, using low speed, blend together the cream cheese-marshmallow mixture, Dream Whip and semi-molded jello. Add the drained pineapple and pecans to mixing bowl. Pour into a mold and chill until firmly set.
Serves 6.