You can either use the Intel(R) Integrator Toolkit (click hereq for the list of supported boards) or the Intel(R) Integrator Assistant (IIA) (click here). As for the details on the image files that can be used for customizing the splash screen, please, refer to the following URLs, accordingly:
The two last links have more info. on how to use both tools.
I appreciate your response however I have already read both articles and still am not able to change the bios splash..The update takes sometimes 30 minutes before my pc restarts and the splash remains the same..sometimes it says update successful sometimes it says unsuccessful..Can you tell me the exact file format and file bit size for my particular board?
Thanks again for your help.