The White House is finally ready to fill some key civil rights posts. John Payton, counsel for the District of Columbia government, is likely to head the Justice Dept.'s Civil Rights division, a job that was to have gone to Lani Guinier. New York labor lawyer Ida Castro has emerged as a top contender for chair of the Equal Employment Opportunity Commission (EEOC), while Washington attorney Joseph Sellers will likely be the EEOC's general counsel. And longtime Commissioner Mary Frances Berry will probably be named chair of the U.S. Commission on Civil Rights.