Working from Rob's suggestion framework and from the work done by Mark Sandell, I set out to light my 2007 era Millennium Falcon 10179.  Instead of 18 cool white PICO LEDs in the engine bay, I used 36, lighting the top and bottom blue lens in each block.  I added cool white LEDs for the top and bottom gun turret and one for the cockpit.  I also added one to the loading ramp, and adding the magnetic switch to turn it on and off. I did replace the head lamps with cool white LEDs rather than the warm white - I found them too yellow for headlamps.

I did go (way) overboard and routed all cables internally, drilling holes in pieces and using a dremel tool to make space for the LED boards and cabling.

The Biggest modification I made is storing the battery pack in the left side of the ship and modifying one of the "grill" pieces to be the power switch.

Parts List:

Lighting Effect Starter Kit for LEGO® Models
On/Off Pushbutton Switch With 4 Color Caps and Light
Magnetic Switch Set-- Normally Open
Brickstuff 1:9 Expansion Adapter with Micro Plugs (x4)
Brickstuff 1:8 Expansion Adapter with Large Plugs (v2.5)
Pico LED 10-Pack (cool white) (x4)
1.5" Extension Cables for the Brickstuff LEGO® Lighting System (4-Pack)
Various length extension cables