Does anyone know how remove headliner inorder to install xm antenna. (factory type that requires drilling roof)

Does anyone know how remove headliner inorder to install xm antenna. (factory type that requires drilling roof)
Did it once before with a cell phone antenna, I'm sure it's very similar. If you pull off the A-pillars and possibly the B-pillars, visors and pull down the weather stripping you should be able to get enough clearance as long as you have a buddy hold down the headliner w/o creasing it you can drill from the top down. Make sure you use a short bit and extra care as to not go down to far and pierce the liner. Good luck