To specify full paths instead of simple file names in links from the helpset file:
[JavaHelpOptions] or [OracleHelpOptions]
; HSPathNames = No (default, strip path from filenames)
The default setting, HSPathNames=No, is almost always the correct value, because the navigational files referenced in the helpset file are almost always in the same directory (see §11.3.7.1 Understanding the JavaHelp / Oracle Help directory structure). The only reason to put navigational files elsewhere would be to accommodate a proprietary standard; this setting is intended to support that use only.