Where do I find the equivalent of Blender Render's texture slot panel in Cycles? I'm watching this tutorial, except I'm doing it in cycles.

I'm at 21:29, and I've noticed that he has a panel with texture slots in it..



I do not have this panel though..



It could be because i'm using cycles, or because I'm using a far newer version of blender than him.. Can anyone help me figure out how I'm supposed to create the 3 texture slots without the panel?
Switching to the cycles render and then to the blender internal render removes the texture slots. The video also mentions that they are using blender render and not cycles.