CFW doesn't mean it starts at boot, it means that the firmware was altered in some way, shape or form to change the user experience (hence "custom"). Granted, most current CFWs don't really add much aside from patching sigs but that's beside the point.I know someone who wrote his own awhile back (not going to reveal names), but publicly, no. There is just the official firmware. rxTools, PastaCFW, CakeCFW, and all the other so called "custom firmwares" are just apps that apply on-the-fly patches to the official firmware. That's why everything is back to normal as soon as you reboot.
