Mix butter and cream cheese in mixer until thoroughly blended. Add powdered sugar and thoroughly incorporate until smooth and creamy. (Sifting the powdered sugar helps prevent lumps when creaming everything together.)
In separate bowl, whisk together pudding mixes and milk. Fold in whipped topping. Gently combine pudding mixture with cream cheese mixture.
Add half the cookie crumbs to bottom of a 10-inch pie plate. Spoon in pudding/cream cheese mixture. Top with remaining cookie crumbs. Add previously prepared skeleton bones to the graveyard "dirt". Store in refrigerator.