In Monty Python's Dead parrot sketch when John Cleese returns to pet shop from the railway station in Bolton, he's having this dialog with Michael Palin:


  J.C.: I understand this is Bolton.
  
  M.P.: Yes.
  
  J.C.: But you told me it was Ipswich!
  
  M.P.: It was a pun!


Then Cleese turns back and starts to look around like crazy. Why would he do that? I thought a pun was a kind of word joke.


Question: pre hung doors to fit into old frame
Answer: All you need to do is install the door with what is called a "jamb extension". Just get some strips of 5/8"x3/4" inch molding, then glue them to the non-hinge side of the new door jamb.  On a painted jamb these will for all intents and purposes disappear with sanding and some wood putty.  On a stained jamb you'll be able to see the extension, but you can minimize how much it stands out by picking wood with a similar grain pattern.