Creating Modular HTML Help Systems
http://www.componentone.com/d2hhelp/KBase/ModularHTMLHelp.pdf

ComponentOne
1999

Abstract:

It is possible to create good, efficient, easy-to-maintain HTML Help systems - and it really isn't that difficult. The bad news is that if you're not sure exactly what settings need to be made, you will find creating modular HTML Help systems very frustrating. Read this article and avoid being frustrated.