Unlocking F.13 BIOS on HP 350 G2 with test clip to set DVMT

[mrssmr]

Hey guys,

so I tried to change the preallocated DVMT value in my BIOS but the advanced settings are hidden. Then I tried to change the variable via UEFI Shell grub following this guide:

http://www.tonymacx86.com/yosemite-lapto...ptops.html

Turns out the BIOS and the variables are locked/encrypted/whatever and I can't change them. Since I need to change that setting to get OS X running properly, I'm ready to go further. I've found following post:

https://www.bios-mods.com/forum/Thread-R...5#pid74575

First of all, I couldn't find a modified version of my BIOS which still was online. All links of it were removed.
This is the version from the manufacturer:

http://h20564.www2.hp.com/hpsc/swd/publi...nvOid=4059

Here's my hardware information: 
HP 350 G2 Laptop
CPU Intel Core i5 5200-U @ 2,2 GhZ Broadwell-U Socket 1168 BGA 
Mainboard Hewlett-Packard 803A KBC Version 46.11 
GPU Intel HD Graphics 5500, board manuf. 0x103C (0x803A)

I don't know yet which BIOS chip model I have and wanted to ask if someone has a modified version of my BIOS or can unlock it for me so I can access the DVMT setting or change it with the UEFI shell and if I can order this programmer to flash the bios:

http://www.amazon.com/CH341A-Series-EEPR...B00PFFND0Y

or which one I'd need to reflash this Notebook. I will have a look inside tomorrow but right now I'm missing a [censored] driver to open it up..

Thanks and best wishes