title: Add more than one checkbox when install with Wix is over
body: <p>I have an setup for my C# application. At the end of setup I added a checkbox proposing to launch application. It works good. But i'm unable to add a second checkbox proposing to launch an optional installer.</p>
  
  <p>There is my code:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;?define compagny = "myCompagny"?&gt;
  &lt;?define product = "myProduct"?&gt;
  &lt;?define version = "!(bind.FileVersion.MyProject.exe)"?&gt;
  &lt;Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"
       xmlns:util="http://schemas.microsoft.com/wix/UtilExtension"&gt;
    &lt;Product Id="*"
             Name="$(var.product)"
             Language="1033"
             Version="$(var.version)"
             Manufacturer="$(var.compagny)"
             UpgradeCode="PUT-GUID-HERE"&gt;
      &lt;Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine"/&gt;
      &lt;Icon Id="icone.ico" SourceFile="$(var.MyProject.ProjectDir)\Images\icone-VR.ico"/&gt;
      &lt;Property Id="ARPPRODUCTICON" Value="icon.ico"/&gt;
      &lt;MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed."/&gt;
      &lt;Media Id="1" Cabinet="MyProject.cab" EmbedCab="yes"/&gt;
  
      &lt;Feature Id="ProductFeature" Title="$(var.product)" Level="1"&gt;
        &lt;ComponentGroupRef Id="ProductComponents"/&gt;
        &lt;ComponentRef Id ="ApplicationShortcut"/&gt;
        &lt;ComponentRef Id ="ApplicationShortcutDesk"/&gt;
      &lt;/Feature&gt;
  
      &lt;WixVariable Id="WixUILicenseRtf"
                   Value="..\license.rtf"/&gt;
      &lt;WixVariable Id="WixUIBannerBmp"
                   Value=".\Resources\WixUIBannerBmp.bmp"/&gt;
      &lt;WixVariable Id="WixUIDialogBmp"
                   Value=".\Resources\WixUIDialogBmp.bmp"/&gt;
  
      &lt;Property Id="WIXUI_EXITDIALOGOPTIONALCHECKBOXTEXT" Value="Launch $(var.product)" /&gt;
      &lt;Property Id="WIXUI_EXITDIALOGOPTIONALTEXT" Value="Warning. If you don't have optionnal package, consider to install it."/&gt;
  
      &lt;Property Id="WixShellExecTarget" Value="[#MyProject.exe]" /&gt;
      &lt;CustomAction Id="LaunchApplication" BinaryKey="WixCA" DllEntry="WixShellExec" Impersonate="yes" /&gt;
  
      &lt;UI&gt;
        &lt;UIRef Id="WixUI_Minimal"/&gt;
        &lt;Publish Dialog="ExitDialog"
                 Control="Finish" 
                 Event="DoAction" 
                 Value="LaunchApplication"&gt;WIXUI_EXITDIALOGOPTIONALCHECKBOX = 1 and NOT Installed&lt;/Publish&gt;
      &lt;/UI&gt;
    &lt;/Product&gt;
  
    [...]
   &lt;/Wix&gt;
  </code></pre>
  
  <p>How can I add another CheckBox to launch <code>./Resources.myOptionalPackage.exe</code> ?</p>
  
  <p>If I can't add another checkbox, can I add a new dialog page used to install the feature ?</p>