Here's the full code to edit the opening and closing screens, the colors of Zelda's tunic, and a few other things. Simon says it was no trouble at all to create, but I don't believe that for a minute. :P
You'll need Python installed and a Legend of Zelda ROM labeled "original.nes" to run it. It'll spit out a new file called "hack.nes" but remember that it won't alter the shape of the sprites. That's all Tile Layer Pro. If you have any questions about editing, like editing the colors, please post them here and I'll be happy to help. If you have a question about Python, you can ask in the comments, or ask it at my boyfriend's blog.
Code after the jump