FitzGerald Communications, which rode the high-tech wave, has established a "special situations" group to handle corporate messes such as accounting irregularities, management shake-ups, class action suits and bankruptcies. The unit is headed by Nicole Russell, a former employee of Hill and Knowlton, where she served as spokesperson for Sunbeam during the "Chainsaw Al" Dunlap days and Cendant, victim of the largest accounting fraud in history.