@wlado93
I don't know the required level for your HW mod. But, I do some electronics things (solder do not worry me). I'm currently reversing the convenience data bus of my car in order to create a remote control for handicapped people (my girlfriend in my case). The project is in good state (headlights calls, turning indicator, wiper controled by my computer presently).
Regarding to this, I'm curious about what I need to do to patch my unit :) You can MP me if you want.