removing the overhead console
To remove the overhead console on a 4th gen, work your fingers under the front edge (near the windshield) and give it a firm tug downwards. Clips hold the console in place on the front with a claw holding the back. If you're running wires up there (e.g., the video feed), you'll probably want to run them down the A-pillar, behind the kick panel and under the door sill to avoid any potential interference with the sun roof mechanism.
One alternative to consider is putting the monitor in your sun visor; it's definitely thick enough to hold an LCD screen. The non-lighted visosr are easier to mod than the lighted version of the visor.
Good luck; post up some pics if you go through with it.