Texture IDS im sure i wasn't doing it right
if your going from the tut like i was MAKE SURE when you click the editable mesh & select faces ( perss ctrl +A ) so it all highlights red before you set the ID.
obviously the next step is to press M once your out of editable mesh to bring up the material editor where you set the textures you assinge to the same ID .
Directly i belive i was not pressing ctrl +A to select the whole mesh that was my issue . hope its the same for you!)