When you turn on your Wii you should see two brief flashes in the disc slot, or you could also try putting the bootmii files in your sd card, if it takes you to bootmii upon powering up then it is installed as boot 2
You could always just rerun the newest hackmii installer. It will tell you if you can install bootmii as ios or boot2. That is the fastest way that I know how. It only takes less than a minute for it. IMO it is faster than moving bootmii to the root of SD.
