RH-generated WebHelp will display in your browser; Microsoft uses its own format for their help – you might be able to transform HTML pages into MS’s format, but there’s nothing in RH that will do it for you.
@Jeff. Yes I saw that but also noted they wanted a single pane viewer and thought that might be easier. I've yet to see anyone report on using the format you refer to.
I've seen discussions in some tech writing circles talk about the contortions required to get content into that format. Mostly it seems to involve using Visual Studio. Way too complicated for me ;>)
Soo, out of curiosity I opened Word 2010 and summoned the help. It looks like this:
Then I opened the live example at the HelpEssentials site. It opened in my browser and I decided to float it into a window of its own:
So if one uses the free layout that is offered on HelpEssentials, they should be able to come pretty close. Their developer might need to tweak the code a bit to ensure the window opens on its own and sized appropriately with as little chrome as possible.