Just thinking out loud, but has anyone thought of trying to dual boot firmwares? I know you can't fit 2 firmwares on the internal flash but it would be nice if you could load a firmware on an external usb drive and boot into it after the PBO loads the firmware from the internal flash, similar to chroot in a linux enviroment. This could make testing other firmwares safer and easier and allow you to get the best of all worlds. I assume if its possible it would have to be done through telnet.
Any ideas why this would not be possible?