Dear Anonymous Monk,
one option i would try in parallel is checking with the Perl-Win32-Users mailinglist at ActiveState.com, who from the looks of it on metacpan, have the rights for this module.
They might be able to answer a query , wether comments can be added to a Word Document.
They may have the rights for the module, but the Word OLE-Interface is from Microsoft. His question had nothing to do with sending the commands to Word (that would be OLE), but Word-specific commands implemented in Word's OLE interface.