This is a toolbar developed in Word 2003 or an earlier version. It is not a ribbon modification, per se but rather the implementation of a legacy commandbar. Each of the icons is linked to a macro or a Word Command. I know of no way of deciphering which icon goes to which command other than trial and error. If you want a similar example, take a look at my Legal Toolbars Add-In.

If you have access to Word 2003, you could easily edit the toolbar.

For easier solutions, consider adding your macros to the QAT or writing your own custom tab.

• Modifying the Quick Access Toolbar (QAT) in Microsoft Word
• Customize the Ribbon (It doesn't take rocket science) by Greg Maxey

QAT modifications are fairly easy through the user interface although coming up with different icons for the different macros requires XML. Modify Quick Access Toolbar (QAT) Button Image or Text by Greg Maxey
QAT modifications can (and, IMO, should) be stored in the same global template that holds the macros.