Hi,
I know it's an old thread, but for anyone who has this issue and came here,
I made a plugin for 3DS Max, using Maxscript, that lets you, after installing it, add a button on the main toolbar, and when you press it
You can create and place the Vray Physical Camera and its target using your mouse,
Here's is a link to the Video Tutorial:
The script is in the description area under the video