This is PHOTOSHOP. You can easily tell on most of the so called "Guro" images. (Half of them are blatant.) The original set did not have anything else to it, these look like whoever did it tried to shop it to something MUCH more extreme.
The so called "New material" is just stuff someone photoshopped/edited on. You can tell by the amputations, as the same one on her leg is just shortened to fit her arm, among other obvious ones. Again people saying this is the lost set are wrong; it's just something edited to be more extreme.
The other/original Collage did NOT need to be removed for this edited "New Material"
pic is from Moe-ren.net , one of the raunchy pic uploaded gazo slum section . From what i can tell the photoshop artist "lived" near fukushima and has never been heard of since then T_T
Regarding set , the later parts are photoshopped over the original photoshop , personally I like the original set .