Karen Laidlaw-Beal, wife of composer John Beal and associate producer of his trailer music company, Reeltime Music, died March 16 at her home in Toluca Lake following a lengthy illness. She was 55.In addition to her husband, she is survived by son Matt, a brother and two nephews. Private services will be held April 25. Family suggests donations in her name to Matthew Laidlaw Education Fund, c/o Financial Management Intl., 9465 Wilshire Blvd. Suite 518, Beverly Hills, CA 90212.