SJH

just wondered if anyone on here could help me with my steering wheel problem.
ive bought a aftermarket steering wheel to replace my standard one on my 96 classic its got a airbag so i got a boss kit from revolution who said what i might have to do is rewire the horn to a seperate switch on the dash and also take out the fuse to airbag light witch may stay on after fitment.
when i took it to my local subaru garage they said that it couldnt be fitted as i didnt have a import car.
are there any instructions anywhere which i could use to give it a go or will i just be opening i can of worms.i not sure that the garage wanted to do it on a friday afternoon.
cheers
simon