Roast the pumpkin, put through a food processor, then add to mash with 1 lb rice hulls to every 4 lb pumpkin. This should prevent a stuck mash. I would not recommend adding the pumpkin to the boil. I have tried both methods and when boiling it I ended up with too much starch in the beer. I...
Update:
Probe started reading off during the second brew. I noticed there was a fair amount of lubricant left in the tube after I threaded the probe and I was a bit worried about it. The stuff melts at 120'F, and it ran down the tube to where the probe meets the wire and must have messed it...
I just tried this and it was a success through the first brew. Bought this probe therm from morebeer and this silicone hose. Picked up #60 O-Rings (1/4" O.D. x 1/8" I.D.) from Lowes. Heated up some food grade lubricant for a few seconds over the stove just until it melted then sucked it...