Power Dreaming (PD) is a demonstration project that augments the current behavioral health approaches for warrior trainees (WT) and other patients suffering from nightmares related to PTSD and/or traumatic brain injury (TBI). This treatment leverages leading edge technological advances in biofeedback and virtual reality (VR) to illicit adaptive responses to acute stress. Many behavioral health modalities that rely on "relaxation" and "imagery" as primary therapeutic components do not measure relaxation responses, nor do they address the fact that many patients do not have sufficient imagery skills to produce a change in behavioral conditioning. Power Dreaming directly improves on these therapeutic models by utilizing heart rate variability biofeedback to measure the relaxation response as well as virtual reality machinima to enhance imagery capability. The goal is to increase the locus of control and reduce allostatic loading (stress) associated with nightmare activity. Unlike virtual exposure therapy, the objective of the PD model is to develop imagery that is both customized by the trainee and neurologically "distracting" (with the desired outcome of stimulating the development of a clinical relaxation response). PD is a training system that puts behavioral health computer tools in the hands of the war fighters. This paper presents our approach to evaluating PTSD-related nightmares through a combination of behavioral health and VR Training within the context of a research and development protocol.