How to animate a texture

Hey, I'm pretty much new to Unity and I'm using the free version.

I have made a series of about 40 pictures of water moving. For example:

alt text

(Not sure if they're the best examples out of the lot)

Now, I've got my plane and I've found a script online (unity community)

 #pragma strict
 
 var uvAnimationTileX = 24; //Here you can place the number of columns of your sheet. 
                            //The above sheet has 24
  
 var uvAnimationTileY = 1; //Here you can place the number of rows of your sheet. 
                           //The above sheet has 1
 var framesPerSecond = 10.0;
  
 function Update () {
  
     // Calculate index
     var index : int = Time.time * framesPerSecond;
     // repeat when exhausting all frames
     index = index % (uvAnimationTileX * uvAnimationTileY);
  
     // Size of every tile
     var size = Vector2 (1.0 / uvAnimationTileX, 1.0 / uvAnimationTileY);
  
     // split into horizontal and vertical index
     var uIndex = index % uvAnimationTileX;
     var vIndex = index / uvAnimationTileX;
  
     // build offset
     // v coordinate is the bottom of the image in opengl so we need to invert.
     var offset = Vector2 (uIndex * size.x, 1.0 - size.y - vIndex * size.y);
  
     renderer.material.SetTextureOffset ("_MainTex", offset);
     renderer.material.SetTextureScale ("_MainTex", size);
 }

  

Now to my question, how can I turn these PNG's into one animation and put it onto my water plane so I can get realistic looking water without using the pro feature.

Sorry for the length question,

Thanks in advance, CMNatic