Phoenix bios option rom? (lenovo v570)

[nrdgd56]

i would like to replace the lan optrom with PLOP boot manager, however i cannot find a single guide or tut on how to do so in Pheonix bioses. 
its Realtek pcie gbe famiy, pci ids : 10EC:8168 if that matters.

is it possible? is there a guide? can anyone point me in the right direction here, even if its not possible id like a confirmation of that. 

thanks in advance