We will make simpliest as possible setup package wrapping existing installer, InnoSetup for example.
First we need make directory tree, required element is TARGETDIR Directory
<Directory Id='TARGETDIR' Name='SourceDir'>Inside we will describe temporary folder for wrapped package
<!-- temp folder --> <Directory Id='TempFolder'> <Component Id='my_setup' Guid='{YOUR-GUID-HERE-8148-2F82D9E7B4AE}'> <File Id="mysetup_exe" Source="mysetup.exe" /> </Component> </Directory>