Giada F102D Bios problem

Hi!

I just bought Giada F102D http://www.giadatech.com/index.php?act=pShow&id=15

I am trying to install smoothwall firewall but bios is GTP mode but instead of that it needs to be MBR mode. I really do not know is this right place to ask help about this but I am trying Cannot find any way to change bios mode in bios setup options.

There is currently BIOS:

Phoenix SecureCore TianoSetup
BIOS version L6600015

TY for you help & support!!