How to convert multiple Word document to a single CHM?

* This feature requires the professional edition.

1.    Create an empty Word document as a master document.

2.    Insert an existing document into this master document.

3.    Repeat the step 2 to insert all related documents into the master document.

4.    Save the master document.

5.    Run Word-2-CHM and select the saved master document.

6.    Enable the option “Merge Sub Docs”.

7.    Click the  button to create the CHM.