Sustaining a musical career in two different genres can be like trying to get a dog into a boat; its front paws are in the boat, its back paws are on the dock, and the distance between the boat and the dock expands until the dog falls into the lake.  If any Rocker can manage to be the dog and not end up in the drink, it could be Steven Tyler.  The Aerosmith frontman wants to Rock with his band of decades and to prove himself as a Country act.  A lot of his contemporaries seem to think he can pull both off.