Mix gelatin, salt, and 1/4C sugar in a saucepan. 
Beat together egg yolks and milk.  Stir into gelatin mixture. 
Over medium heat, stir and cook gelatin mixture until dissolved. 

Chill gelatin mixture, stirring mixture occasionally,
until mixture is partially set.

Beat whipped cream until stiff.  Fold in 2T sugar. 
Beat egg whites until soft peaks form. 
Gradually add 1/4C sugar, beating until stiff peaks form. 

Gently fold together: gelatin mixture, 1/2C whipped cream and
1/2C chopped nuts.  Fold vanilla into the mixture. 
Pour into pie shell.  Chill at least 12 hours. 
Top with remaining whip cream and nuts.