Your first point has nothing to do with BibWord. Word provides the parsing functionality to convert a 'contributor string' into a set of valid names. The same rule is used for all formatting styles.
Luckely, this functionality is also offered through an XSLT stylesheet. In the directory where the Word executable is found (commonly under '%programfiles%\Microsoft Office\Office XX' with XX being a number) there is a subdirectory bibliography. In it, you will find Author2XML.XSL. This file does all the author parsing for you, you will need to adapt it to fit your needs.
Make sure you make a backup before you alter the file.
Regarding your second point, can you provide a screenshot or more information as I don't understand what you mean by "narrowed form".
Luckely, this functionality is also offered through an XSLT stylesheet. In the directory where the Word executable is found (commonly under '%programfiles%\Microsoft Office\Office XX' with XX being a number) there is a subdirectory bibliography. In it, you will find Author2XML.XSL. This file does all the author parsing for you, you will need to adapt it to fit your needs.
Make sure you make a backup before you alter the file.
Regarding your second point, can you provide a screenshot or more information as I don't understand what you mean by "narrowed form".