Hello! I own a Latitude D400. The machine comes equipped with an Alps DualPoint pointing stick and pad. Since I primarily use the pointing stick and the 2 mouse buttons directly below the keyboard, the touchpad and the left and right mouse buttons below it become obsolete. I was wondering if it was possible to remap the functions of the lower pair of mouse buttons without affecting the left and right mouse buttons that are used with the pointing stick. It would be nice if one button could be remapped as a "scroll" button, similar to the middle button on IBM ThinkPads. I know that both buttons can be pressed simultaneously but this is cumbersome. The redundant functionality of the buttons seems wasteful. Thanks!