[the_other_guy]

lets say you wont to add internet tv to live tv you would set up plug-ins
edit home.xml
find
<include content="WidgetListSquare">
       <param name="content_path" value="addons://sources/video/"/>
       <param name="widget_header" value="$LOCALIZE[1037]"/>
       <param name="widget_target" value="videos"/>
       <param name="sortby" value="lastused"/>
       <param name="sortorder" value="descending"/>
       <param name="list_id" value="8100"/>
       <param name="fallback_icon" value="DefaultAddon.png"/>
      </include>

copy it to <control type="grouplist" id="12855">
under
<include content="WidgetListCategories" condition="System.HasPVRAddon">
       <param name="widget_header" value="$LOCALIZE[31148]"/>
       <param name="list_id" value="12900"/>
       <param name="pvr_submenu" value="true"/>
       <param name="pvr_type" value="TV"/>
      </include>

internet radio would be copy this to
<include content="WidgetListSquare">
       <param name="content_path" value="addons://sources/audio/"/>
       <param name="widget_header" value="$LOCALIZE[1038]"/>
       <param name="widget_target" value="music"/>
       <param name="sortby" value="lastused"/>
       <param name="sortorder" value="descending"/>
       <param name="list_id" value="8200"/>
       <param name="fallback_icon" value="DefaultAddon.png"/>
      </include>

to <control type="group" id="13000">
under

<include content="WidgetListCategories" condition="System.HasPVRAddon">
       <param name="widget_header" value="$LOCALIZE[31148]"/>
       <param name="list_id" value="13900"/>
       <param name="pvr_submenu" value="true"/>
       <param name="pvr_type" value="Radio"/>
      </include>

images
<include content="WidgetListSquare">
       <param name="content_path" value="addons://sources/image/"/>
       <param name="widget_header" value="$LOCALIZE[1039]"/>
       <param name="widget_target" value="pictures"/>
       <param name="sortby" value="lastused"/>
       <param name="sortorder" value="descending"/>
       <param name="list_id" value="8500"/>
      </include>
<control type="group" id="4000">