title: Split WiX ComponentGroup across multiple files
body: <p>I am an InstallShield veteran but keen to move our product over to Wix. So far I am impressed and enjoying the challenge but I have one question:</p>
  
  <p>I have split my source files (*.wxs) up as they were getting rather unwieldy. I have split the registry and file parts into separate files, however I would like them to be part of the same component group and I get an <code>error LGHT0091 : Duplicate symbol</code> when I compile the files with the <code>ComponentGroup</code> Id tag set the same.</p>
  
  <p>Is there a way to have multiple files which contain child elements for the same ComponentGroup?</p>