Cape Canaveral (Florida): With astronauts hustling inside and out, the international space station got its biggest live-in addition yet, a Japanese lab stretching 37 feet that opens for business on Wednesday. Japanese astronaut Akihiko Hoshide had the honor of installing the billion-dollar lab, named Kibo, which means "hope', just as two crewmates were winding up a spacewalk on Tuesday. He used the space station's robot arm to nudge the bus-size lab into place. "We have a new hope on the international space station,' announced Hoshide. Nasa's deputy space station program manager, Kirk Shireman, later noted, "It was an amazing day.' The drama was to continue on Wednesday afternoon, when the 10 space fliers on the linked shuttle and station open the doors to the lab and float in. A far more mundane matter was on tap for the morning: toilet repairs. Space shuttle Discovery's crew hand-delivered a new pump for the space station's malfunctioning toilet, and the two Russians on board planned to install it. The job was expected to last two hours. The space station crew has been forced to flush manually with extra water several times a day, ever since the toilet broke two weeks ago. The problem is confined to the urine side of the commode. The long process of installing Kibo began with a spacewalk by Michael Fossum and Ronald Garan Jr. They took care of all the preliminaries, removing covers and disconnecting cables, then handed off to the robot arm-operators inside, who lifted the lab out of Discovery's payload bay and attached it to the space station. The Japanese lab is bigger and more sophisticated than the two other labs at the space station. It sports a hatch to the outside and a robot arm for sliding out science experiments. A smaller arm will arrive next spring, along with an outdoor porch for holding the experiment packages. The first part of Kibo