Not too bad. Its held up by all of the trim (a,b,c pillar trim, visors, dome light, etc...), and then I believe its also glued to the roof in these cars. So carefully pull it down. The headliner board is pretty tough, but still be careful with it. In most cars, and I'm sure these ones as well, the only opening big enough to get them thru is the passenger front door, either with the seat slid back/reclined all the way, or removed altogether. At the factory they are usually installed via the windshield opening before the glass is installed, but unless you want to remove your windshield, thats not an option.
-Steve1997 Town Car Cartier
~107k miles, 70mm TB, Ported Plenum, Gutted Airbox, Mechanical Fan Delete, Contour E-fan Retrofit
, Dual exhaust with Magnaflows, MSD Ignition
, KYB Gas-A-Justs, Marauder/HPP rear sway bar, P71 front bar
, air ride reinstated, Blinker Mod, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit.. Smashed 1/13/13....I fixt it
..1996 Mercury Grand Marquis GS
117,485mi. R.I.P. 7/14/12
I've read a lot of threads on CVN, and this one is probably the worst.