I'll grab my service manual when I'm at my parents house later today and post something more specific unless someone beats me to it.
from what I remember its not too hard to remove. Just use allen wrenchs to remove all the screws securing the dash/windshield.
Then remove the big silver allen bolts on the side. and then under the front of the fairing theres a couple bolts/nuts to remove there.
Should come off pretty easy. Putting the dash back on is kind of a pain unless you have small hands.
I've been thinking about putting one of those horns on the bandit as well, just never really sat down to figure out where I would fit it.