Replace Project Textures Script

Hello,

In this question: http://answers.unity3d.com/questions/813573/replace-project-textures.html I've asked if it was possible to replace the texture assets of the scene's Hierarchy for new textures in the project folders, but instead of taking the single texture files, grab the texture from a spritesheet. Epic Wolf answered that an Editor script could do the trick. My developer banged his head against the wall trying to achieve this and I was wondering if someone did something like this in its own project and would like to share the knowledge or give some pointers on how to achieve this. If such script is possible it would be a time saver! Also, I'm surprised nobody else asked this before, it seems to me that it could be a useful tool.

Thank you Uniters!

• Rodrigo