Setting up lightburn to use negative y cordinates on ray

To get lightburn to work correctly with the ray you need to offset the y axsis to -400 by sending the following comand to the laser G10 L2 P1 X0 Y-400. Is there a way to automatically send this comand whent starting lightburn? And to send the following comand G10 L2 P1 X0 Y0 when starting luban? If you forget to set this correctly the machine runs past its boundries which is not good for the ray.