QTR-Quadtone RIP

I am using the QuadtoneRip graphical interface on my Windoes 8 machine.
In thsi interface I can choose the paper size in a roll menu.  The menu goes to A3, above that size it is possible to define a custom size.
Would it be possible to add A3+ to the menu. Maybe by adding that size to one of the QuadtoneRip setting files (ini etc).