Shader Fade 2 Textures - Need Help

I have this shader I found in the Wiki. It works but

I need to have the ability to fade it out with iTween.FadeTo(gameObject,.2,0);
obviously this doesn't work because _Color property isn't being applied in the "Pass" section. Can someone please help me out

Code (csharp):

1. Shader "Blend 2 Textures" {
2.  
3. Properties {
4.     _Color ("Main Color", Color) = (1,1,1,1)
5.     _Blend ("Blend", Range (0, 1) ) = 0
6.     _MainTex ("Texture 1", 2D) = ""
7.     _Texture2 ("Texture 2", 2D) = ""
8.    
9. }
10.  
11. SubShader {
12.     Pass {
13.         SetTexture[_MainTex]
14.         SetTexture[_Texture2] {
15.             ConstantColor (1,1,1, [_Blend])
16.             Combine texture Lerp(constant) previous
17.         }      
18.     }
19. }
20.  
21. }

 

I have no idea what iTween.FadeTo is. Sounds like you need to get rid of _Blend and use the alpha channel of _Color.

http://www.youtube.com/user/JessyUV#p/c/31F6A116DCCC9F61/1/pCqB-jc-sqU

http://unity3d.com/support/documentation/Components/SL-SetTexture.html

 

no blend gives me the ability to cross between two textures, i need that, what i want is the ability to fade out the entire texture( for example when hiding the button), i want to fade it out

 

http://forum.unity3d.com/threads/89924-Blending-between-alpha-blended-sprites

?