These help files (located in your rhexamp source tree at packages/com/sgi/rhexamp/help/html) serve as placeholders for the real help text for your application. Until you've customized these pages, they can serve as a guide for the changes you'll make to the code to produce a tool which does something more immediately useful than administering little pictures of clocks and printers.
Oh all right. That last part was a damn lie. There is very little real content in these pages yet; sorry about that. Hopefully that will change soon. ("Patches gratefully accepted.")
Probably the first place you want to start is the RhinoExamples page. Also, there are tutorial documents at http://oss.sgi.com/projects/rhino/doc.html.