Hey Buzz
I haven't done an SD-40 but years ago I did add extra lights to a B-36.
It's very easy to do, just a little time consuming finding the lights you need if you don't want to make your own.
If you look at the .bin in the engine folder and look for models which have the headlights as children then just add them as a child to your own engine .bin.
I used Great Northerners SP style lights and gyralight when I was kitbashing a SP B-36.
Screenshot_TestTraK NA_51.11618-6.22267_16-02-44.jpg
Screenshot_TestTraK NA_51.11605-6.22316_16-02-11.jpg
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