As you guide EVA along the two areas, shoot the 2 kerotans along the way(kerotans are little green toy frogs that make sounds when you shoot them) one of them is found on the bottom left of the log bridge(first person view) and the other on is found in the the second area behind a golova tree in the middle of a fork. When you have shot both of these, go to cure and choose EVA, she now should be wearing nothing but her black bikinis, if you zoom in, you should be able to see the outlines of her "womanly parts", and if you look at her in x-ray, you should be able to see her nips