uhm.....not gonna tell you??
nah, I just selected the area that I wanted to disapear and did copy/paste so I had a layer of that area. And then it was just some brushing and copy/paste. A lot of little pieces that were pasted so I did merge down on al those little pieces so I would have only 5 layers or so and not 40+
and after your done with all that you just hold ctrl and click on the layer of the whole area and do select - inverse and press delete so you erase all the surrounding bits that shouldn`t be changed.
hope this explains it a little