Is it possible to add modpack items in that are not normal blocks, such as creatures or things? Through my reasoning (and tell me if I am wrong), the models and whatnot are already in the mod, so they would not need to be recreated, and only need to be added to the "entity list." If this is the case, I recommend a feature where we put a mod file into the program, it sweeps it for model folders, and adds them to the models list. The skins could be applied as any non-default skin is applied. If this is not the case, then mark this off as incoherent rambling and alert me to my mistake please.