[Closed] Switch between 2 materials?

Hi all

I have a large number of models that is pre-textured, and I been given the delightful task to UV correct them. To do that I want to apply an UV texture to all pieces so I can view how the UVW is oriented.
BUT I do not want to screw up the already applied textures, because that would mean alot of extra work re-assigning materials!

So the big question:
Is there a script that allows me to temporarily assign a UW map texture to objects and then easily go back to the original textures?

Take care!

/Matt