Need a very skill photoshop worker for urgent work

We have around 700 images, which you need to download through our website directly. You would download these images, and then make changes to them. The changes required is very simple, where you would just change the center portion of the image, overlay it with diffferent image. We would supply you with the same. HOwever the end result of the image shoudl be very perfect. You need to fix and touch up each image so that it does not look created or artificial. We would supply you with the sample images, details once we receive your bid. We need the work to be done in 4 days, so bid only if you can do the same and if you can pay attention to the quality. If the images are not touched up properly, we would not accept the work. So we need a high skill worker. Bid your best price, and i would send you the details.