Hi John -
Unfortunately you can only customize the Buzzsaw forms - not the reports and dashboards. Our development team may be able to do reports/dashboard customization for a fee; talk to your account manager to see if that is an option for you.
Have you taken a look at Constructware? You can do much more extensive reporting and dashboards, including a grand total of all open Change Order Requests - right out of the box. Learn more about it at http://www.autodesk.com/constructware, or give us a call at (866) 815-3501.
Thanks,
Steve Williams
Autodesk, Inc.