The removal is not really that bad. You take everything connected to the roof down, visors, sunglasses holder, Jesus Bar...etc. The mirror is a bit of a bugger, and I do not remember how to do it right now, but found directions on the ORG. Then it is a matter of pulling down the plastic pieces of trim around the edges, most are connected with the typical trim doo-hickeys that are plastic and ribbed, so they stay in place (no jokes here, please, this is a family show...)
You have to maneuver the headliner board out the back hatch, I tipped it one way to clear the trim, and then the other. It comes out at an angle. Took about an hour to take out, about 2 to get it back in just right...alingment is a bit of a pain, but you just have to be patient.