DDX for disassembling packaged files

Hello,

I created a very basic pdf portfolio using assembler service. My ddx for the same -

<DDX xmlns="http://ns.adobe.com/DDX/1.0/">

  <PDF result="Assembled Form">

    <PDF source="cover" baseDocument="true"/>

    <PackageFiles>

      <PDF source="Waiver Form"/>

      <PDF source="Benefit Form"/>

    </PackageFiles>

  </PDF>

  <?ddx-source-hint name="cover"?>

  <?ddx-source-hint name="Waiver Form"?>

  <?ddx-source-hint name="Benefit Form"?>

</DDX>

Now I want to extract pdf's out of this portfolio. How should the corresponding ddx be for this ? I tried disassembling through PDFsFromBookmarks, page number etc., but none of them seem to work as the source files are in the package.

Thanks for the help..