PSP Push-Activated Shoulder Button Lighting

Sony decided to make the PSP shoulder buttons transparent, leaving modders an excellent opportunity to make the device look way cooler with lighting. Llamma has done a write up on adding lights to the buttons. I wanted a similar effect, but not for the lights to be on all the time. I wanted the buttons to light when they are pushed. This is how I did it.

PSP Push-Activated Shoulder Button Lighting: [Via]