Request to unlock the Acer 5536G Bios

I need to disable the GPU on my laptop, to gain some battery life and reduce the heat produced by the laptop.
I have already tried the one posted by AHMED HOSSAM, but I can't find the option.
The BIOS is aivaible here http://global-download.acer.com/GDFiles/...SC=EMEA_27
Thanks in advance