I suppose you could put them in a blender with a little bit of vodka, then let that soak for a couple of weeks to sanitize. Then you could either add it to the keg or secondary on it (probably in plastic) if you bottle. You could pour the sludge into a muslin bag over the keg or bucket and then tie the bag and rack on top of it. Of course, you would have to throw all concern about head retention to the wind at that point, but who cares if it tastes like PB cups!
Primary: Humulus Congestus
Bottled: Downdraught Imperial Stout, Barrel-Aged Residence Time Barleywine, Sea Smoke Porter
On Deck: Chocolate Peanut Butter Stout, S'more Porter, Barrel-Aged Residence Time Barleywine