Each of the categories (color, shininess, reflection etc... are called channels.  You click the arrow next to color and choose texture map, then on the screen that comes up you will see a folder icon next to the blank box.  Clicking this bring up the browser so you can select the file you wish to use

Quote - Okay, according to instructions I have this model loaded up and am in the texture room. BTW I am using C6.

It says that in the Texture Room, I should see a Shader Tree and a preview of the model (a cube). Okay good so far.

Then the instructions say ***"On the left side of the shader tree click on the color channel menu and select texture map. Note the texture map options on the right side of the shader tree. Click once on  the first folder icon and browse to the file cubeTexture.tif"
*** 
I assume they mean the thing that says Color because I don't see anything that says Channel Menu. If so, what do they mean by folder icon when there is no folder icon that I can see in this, what I assume to be, a Dialog Box. 

This tutorial was written for C5 so  maybe some things have changed??? Any help would be appreciated.