Geektastic:
I'll watch that.
You can buy shotguns with breeching attachments on the barrel end and special cartridges - you push the muzzle hard up against the door hinge and BANG - do it to each hinge and the door just falls in!
Haha, very quick though I suspect falls outside the "non-descructive entry" goal somewhat :P Gotta do what you gotta do though.