Architectural Photoshop (people cutouts into existing office render)

I need someone to Photoshop four different internal rendered scenes (same setting, different rooms). With high detail. The scenes aren't big, you need about 6-8 people per scene. You will need to photoshop people cutouts into the scene. The scene should feel like a relaxed (no suits, no single people) office environment and the people look as if communicating / interacting. You will need to add shadows and general color correction to make it look realistic. The image needs to look realistic. Look at attached file. 2 renders are ready now to start work immediately after selection of freelancer. 2 more will be emails later in the day. I expect a PSD file back with all the layers and details so I can make other changes if needed. I need all the images back by Monday 11 May midnight.