Please take a look at the External Install Button tab over on Eclipse Marketplace for the mpc_install id.
<div class="drag_installbutton"> <a href="http://marketplace.eclipse.org/marketplace-client-intro?mpc_install=252" class="drag"> <img src="/eclipse.org-common/themes/solstice/public/images/components/drag-drop/installbutton.png"> <div class="tooltip"><h3>Drag to Install!</h3>Drag to your running Eclipse workspace.</div> </a> </div>