Just disconnect the battery for some amount of time if you don't want the airbag to go off. Haynes says 10 minutes, some people say 2 seconds? I'd for for 10, have a nice cuppa before you get down to business.
you dont touch the steering wheel so no need to disconnet the battery, just remove the plastics around the steering colum, (only unscrews from the bottem) then the ring of plastic around the egnition barrel just pulls off, then theres 2 screws for the stalk