// Do it again on another slide
SlidePart slidePart2 = presentationMLPackage.createSlidePart(pp, layoutPart,
new PartName("/ppt/slides/slide2.xml"));
Relationship rel = slidePart2.addTargetPart(imagePart);
slidePart2.getJaxbElement().getCSld().getSpTree().getSpOrGrpSpOrGraphicFrame().add(
createPicture(rel.getId()));
// All done: save it