This changes the cabin night lighting of the Captian Sim 767/777 from green to the more modern biege color as used in the 787. It gives the cockpit a more modern feel, and just a lot easier on the eyes on long flights. I'm just not a fan of the green, even though it's historically correct, or so I'm told.
To change the colors, navigate to your Captian Sim 767 or 777 folder, then "SimObjects/Airplanes/CS_B777-300er_GE115B/TEXTURE/NIGHT" and overwrite the DDS files with the ones provided here. (Adjust the file path for your specific 767 or 777 aircraft version.) Of course, never a bad idea to back up your existing files. Saves downloading the plane again if you want to go back. The CS 767 and 777 share the same cockpit, so it shoud work for either.
This works for the direct purchase aircraft from Captian Sim, but I'm pretty sure it will also be the same if you bought it in the marketplace.
If you want to change the EICAS from the incorrect 747 that the plane comes with to the correct 777 two engine display, you can find the addion here: https://flightsim.to/file/23875/captain-sim-b777-salty-compatibility-mod-with-eicas-mod
Let me know if you guys/gals find anything I missed, or have any issues.