Buena Vista Home Entertainment has acquired the U.S. video rights to over 400 films from Roger Corman's Concorde-New Horizons.  The films include such Corman classics as Little Shop of Horrors, Big Bad Mama, The Intruder, Death Race 2000, Grand Theft Auto and Cry Baby Killer.  Corman's films include early work from such stars as Jack Nicholson, Peter Fonda, Dennis Hopper, William Shatner, and a host of others and a whole range of genre films beyond those mentioned above.   The deal also includes the distribution rights to upcoming films from Corman's company.