I did the swap in my 98. the reverse is easy. Just install a toggle switch to the solenoid lock out switch using the cigarette lighter for power. i put the button just below the steering wheel on that plastic shrowd above your knees.
Think they had to get a new yoke for my DS when I had it done as well as shorten the DS and modify the trans. xmember. Reverse was handled by wiring it into the brakes so that I have to step on the brake to put it in reverse.