How to add a grid to an image?

Hello, I am using the UnityPro/iPhonePro trial version. Making a card game in 2D, I have a large image containing the 52 playing cards. I've imported it as an asset, but now I don't know how to proceed.

Is this done via script? I'm reading this, and I think it's what I want to do.

http://forum.unity3d.com/threads/3712-Bringing-2D-images-into-the-scene?p=27485&viewfull=1#post27485

Thanks!

Sound like a job for UV mapping. You could do this with a modeller (I like Blender cuz it's free). You could do this with a script as well, see example here: http://unity3d.com/support/documentation/ScriptReference/Mesh-uv.html