With the hdd i did a test on my xbox 360 and when i put a another hdd it put the version of when the console of the hdd so maybe you can use the hdd of xbox 360 and put a modded firmware and after you put the hdd it put modded firmware and before...
I've been playing fallout4 all day, I went into a elevator and it kept going, never stopped, waited 5 minutes, must of been a bug. How bout you, whatcha do today?