Right click on your Camera in 3dsmax it should give you the option to apply a camera correction modifier. In the modifier roll-out itself click the 'guess' button. It usually gets it right.
Also use the camera correction modifier. It will allow you to create a true one point perspective with all of your verticals running parallel with the edge of your compostition.
@ thank u very much for the suggestion but will this modifiers work with Vray physical cam ? :)