Paramount Pictures has gained support in its three-week-old effort to significantly shrink the amount of time between a film’s theatrical release and its home entertainment debut. The studio announced on July 8 that it had teamed with AMC Theatres and Cineplex Entertainment for a 17-day window on an unorthodox rollout of two low-budget horror films: “Paranormal Activity: The Ghost Dimension” on October 23 and “Scout’s Guide to the Zombie Apocalypse” on October 30. Five additional theater chains have signed up for Paramount’s new plan: National Amusements, the cinema chain owned by Sumner Redstone and daughter Shari Redstone; New Orleans-based Southern Theatres; Alamo Drafthouse Cinema; Canada’s Landmark Cinemas; and the upscale dining-and-movies exhibitor iPic.