I don't really suggest doing this
I would get one to keep just in case it messes up or you have to format SysNand... I installed it the other day, it was working, gave me device to a friend to make a mii (I was watching him making sure he didn't do anything stupid) and when I got it back after he made a Mii, the NVRam had been uninstalled and I had to re-install it.