1) Get your image bg, and the render you're gonna use.

2) Take your render and paste it on.

3) Set the render's layer style to Soft Light, and duplicate it. Then change the new layer's blending style back to normal.

4) Go Filter>Blur>Gaussian Blur With these settings:

5) Duplicate the Soft Light layer, and put it above the Gaussian Blurred one. It should look like this...

Aaand then you're done. Enjoy. :P