title: How to choose processor architecture to install an MSI with Delphi
body: <p>Good news: A major release is in the bag!</p>
  
  <p>Bad news: I just found out (2 weeks too late) that some people don't have MSXML 6 on their machines and the new installer we're rolling out requires it.  </p>
  
  <p>Good news: We can distribute an MSI file to install MSXML </p>
  
  <p>Bad news:  There are three MSI files to choose from, one 'normal' one, one ending in ia64 and one ending in x64.  </p>
  
  <p>I have at my disposal, Delphi 7, C++ and um... Batch files...   How do I make one of those handy Setup.exe's that choose the right MSI to launch automatically.</p>