Also may want to lay down some cloth on the dashboard area. When taking my headliner out I wound up causing a few small scratches in the plastic near the odometer(just behind the steering wheel), where the fiberglass ceiling panel "rubbed" a bit during removal.

Also I believe the instructions on the forum mention prying off the front pillars, I did not do that. After removing the back trunk pieces and disconnecting the pins holding the ceiling up, I was able to just slide the front lips of the ceiling out of the tops of the front pillars. Leaving the front pillars in place also gave me an extra hand(was doing the job solo) when putting the top back in, I was able to rest the front of the ceiling on top of those while I put the pins back in on the backside.