This paper discusses the issues of providing an empirically validated, manual-based-treatment when viewed from the perspective of a practicing clinical psychologist. The trend for empirically proven treatment is reviewed briefly, and initial data are provided illustrating a manual-based-treatment for post-traumatic stress disorder (PTSD) following a motor vehicle accident. The relatively brief (9-12 session) psychological treatment was effective in reducing PTSD symptoms as measured on the Clinician Administered PTSD Scale, for all 10 subjects. The results are discussed from the practicing clinician's perspective: generalization to a clinical population, ethical concerns of limited treatment goals, individually tailored vs standardized treatments in clinical practice, concerns for co-morbid conditions, and how this type of study might impact on practice in an era of managed health care. Issues of incorporating manual based treatments into clinical practice are discussed, with consideration of gains, the limits and the constraints this would bring to the practice of psychology. (C) 1997 Elsevier Science Ltd. All rights reserved.