I had two 3DS. the original one is US one and the new 3DS is japan one. I am playing with Monster Hunter 4g (JP version) on the new 3DS. Since I am using NTR CFW 2.2. (the language plugin) to play it with Chinese. It works work except that I can't play online now (since my firmware is just 9.1.x) Is it possible for me to use the old 3DS (upgrade to latest firmware) and install the regionthree / regionfour. And then play the Japan version of monster hunter (online)? Or even get the dlc mission and then play it on my Japan N3DS? One last thing, one nice guy gave me a private header. Can I replace the one with my existing MH4G game? (without losing the save)? It's because I already played more than 80hours and close to the G rank monster now. So, it's hard to start from very beginning. Many thx in advance for any input.