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. 

pre hung doors to fit into old frame
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.
