How to replace the boot screen with one of your own.
Use the boot.ini /bootlogo switch to modify the boot at start up.
multi disk rdisk partition(1)/WINDOWS="Microsoft Windows XP Embedded" /NOGUIBOOT /bootlogo
Create a bitmap image file, named boot.bmp and copy it to the /WINDOWS folder.  This file must be a 640 x 480 file, with 16 colors (4 bit color, not 16 bit color).