No probs.

Yeah your probably best off saving your work before doing any deleting, just incase!

I think thatyou can just apply the lamber1 material to the object and it will be fine.

Another thing to remrmber is to delete the history at set points as it will relese any nodes that are still connected (you might have to still go and delete them but they wont affect your work) but I think that the smoothe proxy does keep the nodes attached.

Great work on your site by the way!