Wix bootstrapper run msipackage in silent mode

Question

I've created simple bootstrapper project which installs MSXML.msi and x.msi . What I want to is execute msxml.msi in silent mode and then x.msi . but I have absolutely no idea how to pass command line arguments to MSI package

<?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"
     xmlns:bal="http://schemas.microsoft.com/wix/BalExtension">

<Bundle>
    ...
    <Chain>
      <MsiPackage Id="MSXML" SourceFile="msxml_XP_x86.msi" />    
      <MsiPackage Id="MSI" SourceFile="x.msi"/>
    </Chain>
  </Bundle>
</Wix> 

Answer 1

I think DisplayInternalUI is what you are looking for. Values for DisplayInternalUI are either 'yes' or 'no'

<MsiPackage DisplayInternalUI="no" />