Current approaches towards subject-specific FE modelling and virtual testing would benefit from easy-to-use personalization and positioning tools. The PIPER project aims to provide these tools for full human body FE models used in automotive safety as an open-source, easy-to-use software framework that is independent from both model and FE code. In this context the positioning of the spine is of particular interest, while remaining complex because of its high number of dofs. This abstract presents the development of a spline based spinal posture predictor tool relying on linear interpolation between known physiological postures, and its implementation within the PIPER tool.