Liberty buying a stake in Sirius is a good thing. They are considering providing some of the DirectTV channels options over the signal. Which Sirius already has a couple kids channels available over the signal feed.
This would supply a boost once the economy begins to turn around, imagine, Satellite TV in your cars, without the need for a huge dish. Great concept for RVers, family vans, etc.
As for the install for the OP, we need more info about the radio(stock or aftermarket), we assume it's a new mustang based on the avatar.