Replace objects for studio? Change render output name?

I'm rendering my objects in my studio. The studio is always the same with the same lights and camera. I put the objects in the same place with 15 degrees of angulation. I need to render 921 objects.
Is there any script that I can select the max file and replace an object by another while maintaining the same dimensions and position of the previous object to be rendered in the safeframe?
There is a script to change the render output name for the name max file, and send it to the C drive?