AdjustRenderWidth for Vray
It is a script inspired by the script of Martin Breidt "overscan" http://www.scriptspot.com/3ds-max/scripts/overscan and explained by Peter Guthrie.
It is useful when you have a vray camera and you want to extend the view for example a bit to the left without changing the perspective. The calculation is pretty simple but you can save time and confusion using this script.
Run by simply dragging to you max viewport or through the standard run script etc. It asks you to select a vray camera, takes its focal length and the current resolution width and asks you to input new render width. Then calculates the new focal length of the camera, displays it and if you would like to make the change simply press Apply. It changes only the focal length of the camera and the width of the render even if the aspect ratio is locked or it is set to preset (like HDTV). If you don't like it you can use the script to put back your render width and it will adjust the original focal length.
I have tested blending the new extended render over the old one using layers set on difference and they overlap on 100%.
Hope you like it, if you find any bugs let me know. Use on your own risk :)