Asus P5N-D - Manual (Page 122)

5-10 Chapter 5: Software support
9. When the screen returns to the ASUS Update utility, flash the original BIOS to
load the new boot logo.
10. After flashing the BIOS, restart the computer to display the new boot logo
during POST.
8. Adjust the boot image to your desired
size by selecting a value on the Ratio
box.
7. When the logo images appear on the
right window pane, select an image to
enlarge by clicking on it.