Sounds simple enough, but I'm not sure how to do it. I see others talk about using photoshop to create skins and edit them but I don't have photoshop. Is there another way to do this? Thanks...
Go download paint.net, it is a free app and as close to Photoshop as you can get for free. You will be able to change edit and manipulate the skin files, sure not as powerful as Photoshop, but darn good for the price
Paint.NET - Free Software for Digital Photo Editing