Identical material with different textures

Hi,

Below is a text from documentation page I want to implement exactly the same thing for my iPAD app.

"If you have two identical materials which differ only in textures, you can combine those textures into a single big texture - a process often called texture atlasing. Once textures are in the same atlas, you can use single material instead. "

I created a AtlasTexture but I dont know how can I use it for UV mapiing in Unity. Any link/pseudo code/ example will be extremely helpful.. I am stuck on it for past few days now :/

Thank you....

I am using Unity iOS Pro...

EDIT: Here are the steps which I did:

(1) Created a Atlas

(2) Created a material with no texture on it

(3) In the code I get the mesh (which is a prefab in my case) and assign my newly created material to its material property.

• am stuck on* (4) How can I map textures from AltasTexture to the texture of the material?