title: Disable WIN64DUALFOLDERS substitution in WiX
body: <p>I have a setup which chains 2 MSI files:</p>
  
  <ol>
  <li>Either an x86/x64 MSI file that installs my product.</li>
  <li>An x86 MSI file which deploys a third-party toolkit</li>
  </ol>
  
  <p>I wanted the second MSI file to use the same install directory so MSI file 1 stores the user's selected directory in the registry which MSI file 2 then reads and uses as its target.</p>
  
  <p>Fine and dandy - if I install MSI file 1 to <code>C:\Test\</code> no problem - MSI file 2 picks this up and throws the tool kits into that folder.</p>
  
  <p>When I install to <code>C:\Program Files</code> however... then MSI file 2 gets a bit to clever and decides I must have meant <code>C:\Program Files (x86)</code> and puts the tools in there - a bit messy.</p>
  
  <p>It logs this when it does it:</p>
  
  <pre><code>  Action start 16:53:59: AppSearch.
    MSI (c) (2C:44) [16:53:59:521]: Note: 1: 2262 2: Signature 3: -2147287038
    MSI (c) (2C:44) [16:53:59:521]: WIN64DUALFOLDERS: 'C:\Program Files (x86)\' will substitute 17 characters in 'C:\Program Files\Manufacturer\Product' folder path. (mask argument = 0, the folder pair's iSwapAttrib member = 0).
    MSI (c) (2C:44) [16:53:59:521]: PROPERTY CHANGE: Adding INSTALLDIRECTORY property. Its value is 'C:\Program Files (x86)\Manufacturer\Product'.
    Action ended 16:53:59: AppSearch. Return value 1.
  </code></pre>
  
  <p>I am hoping to avoid bloating my setup too much with an x64 version of MSI file 2 (it is in the region of 20&nbsp;MB), so my question is:</p>
  
  <p>Is there a way I can avoid/disable this behaviour and get my x86 MSI file to trust me and write to "Program Files", not "Program Files (x86)"?</p>