Megan,
I'd love to see whatever graphical additions you'd create.
If it's just changing the buttons (those along the right side of the screen) and the chat sheet, then i do not believe any coding will be necessary. Just make sure they are the same size and have the same name as the originals. The table background is a bit more complicated, and took me some digging around in the forum and some testing to finally figure out how to change to make it fit on screen.