You can only do this in the BIOS. The mobo looks unusual so we'll probably have to take this slowly. Do you have a digital camera? If so take a picture of the initial BIOS screen (normally accessed by pressing the <Del> key repeatedly during the early bootup phase) attach it to a message and we'll take it from there.
http://forums.hexus.net/faq.php?faq=...chment_explain