The operating system has not changed how the pods dock. Whatever you did in XP should still work.
There are some workspaces as they are known in RoboHelp 9 on my site at http://www.grainge.org/pages/authoring/rh9/using_rh9.htm Item 8.
They seem to work just as well in RoboHelp 8. Perhaps one of those will give you what you want.
See www.grainge.org for RoboHelp and Authoring tips