Well, you can edit the rhWordDocs.apj file if you want to do it below the surface. It's just an XML and you can create links that way.
The following is a snippet from my rhWordDocs.apj file. For each of the Word documents I'm linking to, the "template_name" value is blank. Where is that set within RoboHelp?
<word_doc>
<file_name>S:\Disaster Recovery Planning\_____DisasterRecoveryDocsSingleFolder\Refresh MDR from REL and wipe.docx</file_name>
<settingsflag>0</settingsflag>
<afolder>Refresh MDR from REL and wipe</afolder>
<pfolder></pfolder>
<type>2</type>
<location>2</location>
<flags>1073741824</flags>
<cshstring>TopicAlias</cshstring>
<authorstatus>0</authorstatus>
<status>3</status>
<template_name></template_name>
<cbt_mode>2</cbt_mode>
<buildtags></buildtags>
<toc_assoc>0</toc_assoc>
<index_assoc>0</index_assoc>
<glossary_assoc>0</glossary_assoc>
<override_flag>0</override_flag>
<gen_files>
<genfile>
<filename>Refresh MDR from REL and wipe\Refresh__MDR_from_REL_and_wipe.css</filename>
<typeid>1</typeid>
<status>0</status>
<chksm>0</chksm>
</genfile>
<genfile>
<filename>Refresh MDR from REL and wipe\Refresh__MDR_from_REL_and_wipe.htm</filename>
<typeid>0</typeid>
<status>0</status>
<chksm>0</chksm>
</genfile>
</gen_files>
<pattern><$paratext></pattern>
<asciionlyfilenames>0</asciionlyfilenames>
</word_doc>