My Toyota OEM LCD accepts a 15khz LCD signal at a resolution of 640x480,
however part of the screen is not visable on the LCD, despite what modeline settings I use. I have tried adjusting the front and back porch timings for the LCD to no avail.

I would therfore like to resize the centrafuse window and move it to the right by 40 pixels or so.

Do I have to make a new skin to do this, or is there a hidden setting somewhere that I have missed?