May 1, 2005 Its Long Trek Over, the Enterprise Pulls Into Dry Dock By DAVE ITZKOFF IN the sector of planet Earth known as Hollywood, it was business as usual on the Paramount back lot. On a sunny day in early March, green-skinned aliens with zippers embedded in their faces were eating catered lunches, stagehands were disassembling lighting rigs labeled "Thorium Isotope Hazard," and all were doing their best to ignore the fact that the warp engines on the starship Enterprise would soon be shut down, perhaps never to start up again. "Welcome," a security guard said with heavy irony,...