Slowly add sugar, cream until mixture is very creamy and sugar is dissolved. Add eggs, one at a time, beating 5 minutes after each addition. Add melted chocolate, beat 5 minutes. Add vanilla, beat 5 minutes. Pour into baked pie shell.
Chill overnite for filling to firm and flavours to mellow.
Add 1 cup sugar a little at a time, beating after each addition. Add 1 teaspoon vanilla. Continue beating until mixture holds soft peaks. Mix cracker cumbs and 1 cup pecans. Fold into meringue mixture a little at a time.