It seems that this manual don´t work with new submenu folders created with SUB_MENU_Maker.cmd.
I can´t set a personal background to this folders. I copy it to _ISO folder with the same name that the folder and don´t work. It seems that .g4b files don´t work too.
The normal folders works OK, but created don´t.
Subject Multiple backgrounds and/or Stamps (v1.A1+)