How do you get sony vaio boot up full screen?

[naty c]

Hi, i have a sony vaio pcg - k315s and i am just wondering if there is a way to make the boot up screen full widescreen. When you get into windows it is fine becuase i have the widescreen drivers. The vaio bios screen is full widescreen but after that it is small in the centre of the screen until windows loads. Even when installing windows xp it is just small in the middle of the screen. My mums laptop is widescreen and everything is widescreen. Just wondering if anybody knows the shortcut keys. Thanks