Bios Mods -The Best BIOS Update and Modification Source

hi
my laptop has two gpu , 1: Intel HD4000 2: Nvidia GT 650M

I need to disable Intel HD4000 , but ther's no option to disable it in bios.
attached my bios backup rom file.
I'll be thankful if some one could help me by unlocking GPU functions.

Thanks
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any help?

some one can guide me how to do it. Is it possible ?