title: Is there a way to drag & drop to copy files between two visual studio 2008 instances?
body: <p>Is there a way to copy files between two Visual Studio 2008 instances ?  A plugin, setting, or something else ?  Currently, dragging a file from one instances to another does nothing (mouse shows that it's invalid operation).</p>
  
  <p>Right-clicking a file and selecting "Copy" from instance 1, and pasting in instance 2 results in the following error:</p>
  
  <blockquote>
    <p>The source files for this operation cannot be found in this solution.</p>
  </blockquote>
  
  <p>Any ideas or solutions ?</p>