BY GAIL EPSTEIN NIEVES

 What does a suspected spy do to blend into the crowd? Act like you and me --
 but use a fake name.

 FBI agent Joseph Hall, on the witness stand Wednesday for his second day in
 the Cuban spy trial, testified in exhausting detail about ID cards and other items
 confiscated from the Hollywood studio apartment of defendants Ruben Campa
 and Luis Medina.

 Sam's Club. Blockbuster. AAA. You name it, they signed up, according to
 membership cards shown to jurors in federal court Wednesday.

 The names Campa and Medina were fake, appropriated from death certificates of
 babies who died in California in the late 1960s, both sides agree. The men used
 the stolen identities to get everything from driver's licenses to Social Security
 cards, Hall testified.

 Medina -- real name Ramon Lavaniño -- even got a U.S. passport and registered
 with the Selective Service under his assumed identity. He's a Cuban citizen, not
 an American. His attorney, Bill Norris, described him in opening statements as a
 Cuban who is ``proud of his country . . . and committed to defending it.''

 Campa's real name is Fernando Gonzalez. The FBI found some 31 death
 certificates among his belongings, Hall testified.

 Prosecutors allege that Campa and Medina were Cuban intelligence operatives
 using false identities and fake life stories to give them cover while in the United
 States.

 Medina had paperwork showing he was a shoe salesman, Hall testified. Campa
 had a business card identifying him as a desktop publisher.

 The five defendants on trial before U.S. District Judge Joan Lenard were arrested
 Sept. 12, 1998, and charged with acting as unregistered agents of Cuba.
 Prosecutors also have accused Medina, Gerardo Hernandez and Antonio
 Guerrero of penetrating U.S. military installations in a bid to pass defense secrets
 to Havana.

 The man accused of being the ringleader, Hernandez, faces the most-serious
 charge: conspiracy to commit murder in the deaths of four Brothers to the Rescue
 fliers who were shot down by Cuban MiGs in 1996. Charged in other counts is
 Rene Gonzalez.

 Defense attorneys acknowledge their clients were working for Cuba. But they
 insist that the alleged spies did not pass classified information to their bosses or
 do anything to harm the United States.