Create a firefox skin

I would like to have a Skin Made for Firefox 3.X It will be themed around a sports team with whom I am associated, and branded to my company. You will have plenty of creative freedom. You will not be able to publicly claim credit as we will give the skin away as a promotional item and it will be credited to us. I am not 100% sure if this project will go ahead as I am not sure about the feasibility of cost.