The changed files are Mig-29-13_cockpit_Texture-1.dds and Mig-29-13_cockpit_Texture-1_SP.dds.
The SP file seems to control the actual brightness.
You can change the non-SP one, instead of quarter circles that I put there, and make them dots around the RWR, and it'll light up as dots instead, it'll probably even be more visible this way, or change the color even. Very easy to do with Gimp. I left it orange to try and keep it as close to RL as possible.