Bones and Mesh

[Juras]

They didn't just make that part of the texture invisible?

Oh yeah, that's probably what they did cause I remember I checked the enemy in the model editor and I could see the invisible wheel polys if I selected the monster. I still think it's possible though to remove a part of the enemy's model that's not attached to the body without the need of re-skinning. That's actually the only thing that may need to be done since you basically can make your own monster, make the same bones as Amnesia Enemy's have and then you can use their animations.