The first problem about models is their triangle count, they have a high triangle count, which Vavoom doesn't support yet, another problem is that the JDoom models are "separated" ( because of the very same thing) in different models, i.e. a normal Imp is formed by 3 different models (body, head, etc.), this isn't supported by Vavoom neither, the model definitions are stored directly on the progs source, so to use JDoom models, you should first reduce the triangle count, then merge all in one model and update the model definitions in progs source, it's not as easy as it seems <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt=":)" title="Smile" /><!-- s:) -->.