A little more detail, but first a shout out to Gato Supreme for motivating me to do this!
The mod consists of mounting an EL (electroluminescent) panel behind the LCD of your detector and driving it with an external power source. These both can be picked up on eBay for a few bucks each.
The panels can generally be cut to fit your screen (just remember to tape the edge you cut or you will have stray voltage escaping from the cut) and will easily fit behind the Delta 4000 LCD screen. Once you measure and cut the panel, slip it into place and tape it to a corner of the circuit board using a small piece of electrical tape.
You will then need to run the wiring from the panel to your power source. The Delta 4000 didn't have a pre-made hole, so I had to drill a small hole in the bottom of the housing to get the wiring out. I installed a rubber grommet to ensure the wires don't wear and ran the power source wiring through it, topping it (from inside the housing) with a tiny bit of silicone to keep any dust out.
One thing to note is that the power source and panel wiring both have clips that were too large for me to get through the detector housing. I cut them both off and simply soldered the wires together for a permanent connection. Once that is all done and in place, I used some Velcro to affix the power source off to the left side of the detector. This prevents excess wire from dangling around and reduces the risk of getting it caught/snagged on something.
That is pretty much it! Please let me know if you have any questions or concerns and I will do what I can to help.
