The RenderMan Menu will be added before Houdini's Help Menu, and the RenderMan - IPR tool will be added after the RenderMan - RIS tool. If youthe top-level menu is customized to remove either the Help Menu or the RenderMan - RIS tool, the RenderMan menu tools will not be installed correctly. You will need to edit the <insertBefore> and <insertAfter> options in MainMenuCommon.xml to position them correctly in your customized menu.