5. The method of claim 1 , further including transmitting first modifiable data for display applying the publisher's base walkthrough version and second modifiable data for display applying the selected contributing author's walkthrough version, wherein the first and second data for display both are to be displayed simultaneously within a single user interface.
6. The method of claim 5 , further including transmitting controls that implement drag-and-drop updating of a selected activity of the publisher's base walkthrough version with material from the contributing author's walkthrough version.