Dude, I would love if this were a class on the RPG world. It could be a druid class or something. I totally want to be a cow. Also, a spider.
That would be awesome.... Does this mod also give you the same attributes as the mob you are? If so than things like creepers might be a grefing tool, because they will show up as a player in config.
It would be so cool to be a spider and skitter all over mountains and stuff. Just imagine how much easier it would be to get over that sheer cliff if you could crawl over it.