29. The computer-readable medium as recited in claim 27 , wherein the process further comprises, in response to the user selecting the content item insertion control, presenting a list of one or more content items stored in a first data store.
29. The computer-readable medium as recited in claim 27 , wherein the process further comprises, in response to the user selecting the content item insertion control, presenting a list of one or more content items stored in a first data store. 30. The computer-readable medium as recited in claim 29 , wherein the process further comprises copying the selected supplemental content item from the first data store to a second data store.