1st layer: In a bowl, melt butter in microwave, add flour and 3/4 cup of pecans and mix well. Press into bottom of glass 9x13" dish and bake at 350 degrees for 10 - 15 minutes until light brown. Set aside and let cool completely.
2nd layer: Cream cheese, 1/2 cup of sugar and 1 cup Cool Whip. Mix until creamy and spread over 1st layer.
3rd layer: Lemon pudding (made to box directions) spread evenly over 2rd layer. ** You can make this in advance and chill in fridge. If you don't let cool before adding it to the pan,let cool before adding final layer**
4th layer: Take remaining Cool Whip and spread evenly over pudding, sprinkle with remaining chopped pecans and place in fridge to cool for several hours before serving. ENJOY!!