Conflicts with binary files

Hi,

  My project has a lot of binary files (such as Excel and PowerPoint) that create conflicts when multiple users edit the document.  Is there a way to keep (merge) all the changes made by all users in those documents instead of having to use the Revert (to keep repository version, and undo all local changes) or Resolved (to keep your version, overwriting repository changes).  This would help reduce the amount of double editing since the users would not have to edit the repository document again.  If you could, please email me back directly.  Thanks for your time.