wt.org.WTPrincipal creator=(wt.org.WTPrincipal)wtcr.getCreator().getObject(); 

wt.session.SessionHelper.manager.setPrincipal( creator.getName() );

wt.lifecycle.LifeCycleHelper.service.reassign(wtcr,wt.lifecycle.LifeCycleHelper.service.getLifeCycleTemplateReference("My Lifecycle Template"));