In the past few days there was a thread on here about possible ways to get the RSC GP9 to throw light and have a more realistic look. Unfortunately there were several references to links that didn't work and one to a pirate site. Linking to any pirate site is against our rules so the whole thread was deleted. Let's try to start this over with some real solutions that work. The NE GP9 over on the NERW site is a wonderful step up if you have The NERW Enhancement Package v 2.0 by Doc (Machinist) Lisboa. Adapting this bin to the locomotive of your choice makes grand improvement.
I'm sure there are some other things that can be done so let's start over and see what all is available and legal to post here.