Blackbox BN2_ How Do I Change Panel Colour

I have the Blackbox BN-2 Islander, V2, and really like flying it. There are a handful of things that could be improved, but anyway, what I would like to do is change the colour of the instrument panels in the aircraft that have blue and white panels and change them to black. There was a mod on Flightsim.to but that no longer seems to work on the V2. I'm pretty sure it's just a matter of changing a few lines somewhere, but I have no idea where to start! I did find some information somewhere a while ago, where I had to copy some lines of text from one of the texture files, but that didn't seem to work either.  Can anyone offer some help? Thanks guys.