AeroSoft proposes to develop a full featured CFD toolkit for analysis of the aerothermal environment and its effect on space vehicles. In Phase I, AeroSoft proposes to implement multi-component ablation along with material response into AeroSoft's structured and unstructured CFD solver GASP. In Phase I, GASP's internal thermal solver will be augmented to include the effects of ablation. In Phase II, AeroSoft proposes to implement radiation heat flux and radiation transport into GASP.