Removing the headliner is not a quick thing to do. Plan on it taking you a couple of hours. I recently dropped mine down to sound deaden/thermal insulate the roof and like every other vehicle I've dropped the headliner, it is a time consuming job. One tip I would give is to remove both front seats as it is easier to take off the B-Pillar trim panels and pull out the headliner in general. You also need to disconnect the battery because you will be dealing with air bag connections in the roof. Also, be careful disconnecting the rear washer tube connector as it is fragile. Have fun!
Do you have an update on your install, I've been researching doing the same. I wanted to replace the headliner and add starlights
