Does your pumpkin pie always crack?! Here's a solution that might help with this pie:
When the pie is done baking, turn the oven off and prop open the oven door to about half way. Keep the pie in the oven. This will allow for the pie to cool slowly rather than experience the sudden temperature change, which often times results in cracks.
To make the crumbs, I add them to a food processor OR a high-powered blender.