Unfortunately, this is the best that can be made for a tennogen skin. From what I know / saw, you cannot bring new assets or animation mechanics, you can only work with what you have as basic tool. For syandanas and helmets, its a little different, but not much : from all that I saw on Tennogen, you can only cloth the blank model that was made at dispotition... So, yeah the mutagene system ( being the way it open, the tentacles inside, ext. ) cannot be changed either, its part of the model as it was created.

aw thats dissapointing :/ hope it comes into the next tennogen update