To specify file locations for window types
Open a project (.hhp) file, and then click Add/Modify Window Definitions.
Adds or edits window definitions and the general appearance of the HTML Help Viewer. Add/Modify Window Definitions adds or edits window definitions and the general appearance of the HTML Help Viewer.
Click the Files tab, and in the Window type box, select the window for which you want to specify file locations.
Type file locations for the TOC and Index files, if you are using them.
Type a file location in the Default box for the HTML file you want to display when the help file is first opened.
Type file locations for the Home button and any custom jump buttons you are using.