Administrator Group and Users

Is there a way to duplicate the functionality of the Local Group Member Report from the Report Library and remove the "include the following computers" field and replace that field with "include the following organizational units" field  from the "group members" report type?  I am trying to run reports where I do not need to enter all my AD computers or Servers individually. I am using this current report to look at all my AD computers and Servers Administrator Groups and show me who the member are. Any help is appreciated...thanks mark