I currently have a 4G greyscale display 20GB iPod. I was thinking about replacing the screen with a 4G color display, but Apple's current firmware on my iPod, I'm assuming, won't support a color screen. What about RockBox? Will the screen function as a color screen using this firmware? It seems to me that the only differences between the 4G with greyscale and color, besides the screens themselves, are a few lines of code in the firmware. If I can hack the firmware, I might be able to get a color screen to work. Has anyone tried this or something similar?