1. A method of generating a screen layout for a BIOS display on a computing system, the method comprising: accessing a screen layout definition, wherein the screen layout definition identifies which of a plurality of stored images are to be included in a screen layout, defines an order for overlaying the identified images, and defines a position for placing each identified image within the screen layout; and processing the screen layout definition to generate the screen layout, using the order for overlaying the identified images and the position for placing each identified image as defined in the screen layout definition, for the BIOS display, wherein a first image in the order for overlaying the identified images is a base image, which sets a display resolution for the screen layout and corresponds to the largest image in the plurality of images.