Merging two msi using wix toolset - wix

Question

How to merge two msi using wixedit, presently they are having 4.0 version of wixtoolset. In the documentation they have mentioned that merging two msi in windows is possible using bundles and chain tags. But whenver I try to do it, it always show some error. Please let me know any example of wix tool set to merge two msi using bundle and chain tags.
I am following Bootstrapper method as provided in pdf of wix 3.6. To bundle two msi using chain element.

Answer 1

<?xml version="1.0" encoding="utf-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi" xmlns:util="http://schemas.microsoft.com/wix/UtilExtension" xmlns:bal="http://schemas.microsoft.com/wix/BalExtension" xmlns:netfx="http://schemas.microsoft.com/wix/NetFxExtension">
<Bundle Name="Prog" Version="0.0.0.1" Manufacturer="my Corporation" UpgradeCode="f380ae43-5df1-4cfe-9297-526e3e333e99">
<BootstrapperApplicationRef Id="WixStandardBootstrapperApplication.RtfLicense">
<bal:WixStandardBootstrapperApplication LicenseFile="..\license.rtf" />
</BootstrapperApplicationRef>
<Chain>
<!-- TODO: Define the list of chained packages. -->
<PackageGroupRef Id="Netfx45FullPackage" />
</Chain>
</Bundle>
<Fragment>
<PackageGroup Id="Netfx45FullPackage">
<MsiPackage Id="Prog" Cache="no" Compressed="no" DisplayInternalUI="yes" Vital="yes" SourceFile="$(var.installerPath)\Prog.msi" />
<MsiPackage Id="Prog2" Cache="no" Compressed="no" DisplayInternalUI="yes" Vital="yes" SourceFile="$(var.installerPath)\Prog2.msi" />
</PackageGroup>
</Fragment>
</Wix>
you can add the variable installerPath