Yep i helped Matman put a 2" lift in his d2 last week, we just unhooked the airbags put the kit in, went to start it, all the lights on the dash lit up like a christmas tree, hazard lights came on, the motor kicked over but wouldn't start
His disco had to spend a night in our shed while our landrover man came with his diagnostic computer the next morning.
He narrowed it down to the central locking system and left us to read the hand book, it told us to type in all these stupid codes into the locking system.
That didn't work, so dad had a chat to another d2 owner and he said to just press the reset button in the engine bay, what do ya know it worked!!!
So i don't think there is any need for a computer apart from telling the airbag lights on the dash to stop flashing

CHEERS TIM.