Bios Mods -The Best BIOS Update and Modification Source

Hi, i want to install a Mini-Pci-E cable for use it for an external GPU ( EXP GDC Beast) and when i try to run the laptop black screen apears and wont boot, it seems to be  withelisted the M-PCI-E port my laptop its a HP Pavilion DV5 2045la and this is the bios i want to mod 

http://ftp.hp.com/pub/softpaq/sp56001-56500/sp56058.exe

Please Help