Its in the rear trunk mounted on the wall. It is directly behind the drivers seat.
You need to undo a few bolts and then disconnect the wiring harness. Its very simple, getting the carpet out of the way will take longer than removing the ecu.
__________________ 99 TWIN TURBO Boxster175k+ miles
Growing up the car magazines said how amazing Porsches are. Was I brainwashed? Somehow...I doubt it.