In a large bowl, pour 1 cup boiling water over the gelatin mix. Stir until dissolved, then stir in 1/2 cup pineapple juice. Refrigerate until thickened but not set, about 1 hour.
Meanwhile, place crushed pineapple and remaining juice in a small saucepan. Bring to a boil, reduce heat, and simmer for about 5 minutes. Remove from heat, and cool to room temperature.
In a large bowl, blend softened cream cheese and lime gelatin until smooth. Mix in the cooled pineapple. In a medium bowl, whip cream until soft peaks form. Fold into gelatin mixture. Fold in chopped nuts. Pour into a pretty crystal bowl, and refrigerate for at least 4 hours, or until set.