HOLLYWOOD, Jan. 17 NBC News will do an entire hour on Michael Jackson's face during the February sweeps, NBC Entertainment President Jeff Zucker announced today. The "Dateline" special "Michael Jackson Unmasked" was approved by NBC President Andrew Lack, who left the network last week to head Sony Music -- Jackson's record label. Oops. "I just hope the folks at Sony Music don't complain," Zucker quipped at Winter TV Press Tour 2003 here. Via an NBC News rep, "Dateline" Executive Producer David Corvo explained that the special will use the "transformation" of Wacko Jacko's face as a metaphor for the transformation...