With TPRT you have the means to make changes to the bin but do you have the hardware to burn a new chip or perhaps emulate the changes? The link I posted, requires you go to the line address in a hex editor and change the bit to whatever the notes in the xdf tells you to change it to. From there you burn a new chip or upload the new bin to your emulation hardware.

My search tip if the forum search doesn't give you stellar results is to type this in your favorite search engine: site:gearhead-efi.com followed by whatever search term you're looking for. You can do this for any other site, too. i.e. site:thirdgen.org