ok this install, flash the rom i linked to, then in multibeast select userdsdt/dsdt free (but do not use any dsdt from here. selecting userdsdt will install the bootloader etc, and when you boot off the hdd, the system will use your boards dsdt) and audio options.
dont install the ethernet kext
keep this as minimal as possible for now.
the key right now is getting the modded bios flashed
did your instructions and got this....
Weird thing is when I boot using -x it works fine.....even starts as my native res of 1080p.
ok so the bios is fixed at least.
that is to hd4000 issue, no idea. maybe need to use a different sysdef.
try the dsdt on the first page. simply put it in the /extra folder and restart