Alter some Images

We need help with fitting (bulk editing) of 207 images. The job is pretty easy and requires only a bit of time (should not take more than 8 hours work) and basic Photoshop knowledge. We provide the front images of various smartphone models in .png files and they should be fitted with the black frame provided in another .psd file, so we can have the end product as in the sample image. This procedure is to be applied to all of the 207 images in the folder. It is very important that all of the images keep their original titles, which are corresponding to the smartphone models after editing. The product images should fill 85% or more of the image frame. The full product must be in frame. Backgrounds must be pure white (RGB 255,255,255). Please let us know if there are any additional questions. We are ready to negotiate on the fee.