Rinku,
In that instance, you'll prolly want to (as an admin) give yourself access to the archive. Do a search for the items of interest, and then export them to a pst. Then hand the pst to the new user, or import the pst directly in to their personal vault. You're sorta doubling data, but that's the only way to get really that granular. Or you could just go the easy route and save yaself some trouble. :)
micah