canes580

I purchased a certified '03 sc430 a few months ago. I was told by the dealer recently that xm cannot be installed by the dealer. Does anyone know if xm can be installed using only the sc430 tuner? If not what is the least intrusive way to mount an xm tuner on an sc430? Finally does any one know a good shop in the Ft.Lauderdale FL. area that won't butcher my sc430 or its sound system ?