rc.xml (applications section)

<application name="urxvt-wallpaper-htop"
              class="URxvt"
               type="normal">
    <decor>no</decor>
    <position force="yes">
        <x>290</x>
        <y>0</y>
    </position>
    <focus>no</focus>
    <iconic>no</iconic>
    <layer>below</layer>
    <iconic>no</iconic>
    <skip_pager>yes</skip_pager>
    <skip_taskbar>yes</skip_taskbar>
  </application>

  <application name="urxvt-wallpaper-climm"
              class="URxvt"
               type="normal">
    <decor>no</decor>
    <position force="yes">
        <x>720</x>
        <y>0</y>
    </position>
    <focus>no</focus>
    <iconic>no</iconic>
    <layer>below</layer>
    <iconic>no</iconic>
    <skip_pager>yes</skip_pager>
    <skip_taskbar>yes</skip_taskbar>
  </application>

  <application name="urxvt-wallpaper-bash"
              class="URxvt"
               type="normal">
    <decor>no</decor>
    <position force="yes">
        <x>0</x>
        <y>260</y>
    </position>
    <focus>no</focus>
    <iconic>no</iconic>
    <layer>below</layer>
    <iconic>no</iconic>
    <skip_pager>yes</skip_pager>
    <skip_taskbar>yes</skip_taskbar>
  </application>

  <application name="urxvt-wallpaper-bash2"
              class="URxvt"
               type="normal">
    <decor>no</decor>
    <position force="yes">
        <x>500</x>
        <y>260</y>
    </position>
    <focus>no</focus>
    <iconic>no</iconic>
    <layer>below</layer>
    <iconic>no</iconic>
    <skip_pager>yes</skip_pager>
    <skip_taskbar>yes</skip_taskbar>
  </application>