title: Specify the INSTALLLOCATION of packages in WiX inside the Burn managed bootstrapper
body: <p>I have a <a href="http://en.wikipedia.org/wiki/WiX" rel="noreferrer">WiX</a> 3.6 bundle (using <a href="http://en.wikipedia.org/wiki/WiX#Burn" rel="noreferrer">Burn</a>) and managed bootstrapper that install several <a href="http://en.wikipedia.org/wiki/Windows_Installer" rel="noreferrer">MSI</a> packages. Some of the packages install to a common location (<code>C:\program files\MyApp</code>). </p>
  
  <p>I want to let the user choose the install location inside the managed bootstrapper application (<a href="http://en.wikipedia.org/wiki/C_Sharp_%28programming_language%29" rel="noreferrer">C#</a> <a href="http://en.wikipedia.org/wiki/Windows_Presentation_Foundation" rel="noreferrer">WPF</a>, especially because the application is large to install; about 1&nbsp;GB). How can I specify the INSTALLLOCATION for each <a href="http://en.wikipedia.org/wiki/Windows_Installer" rel="noreferrer">MSI</a> packages inside my bundle?</p>