OK, call me crazy, but without any real plans, you are going to tear your dash apart and start cutting/sanding on it?! If you plan out exactly what you want first, you will save yourself countless headaches. More than half your time should be spent planning... Just some things to consider.
Any plans on powering the "TV" and PS2?
How are you going to secure your PS2?
How are you going to route your cables?
What kind of cables are you going to use?
Have you considered ground loops?
Will your audio from "TV" and PS2 both feed into the head unit?
Do you have 2 AUX inputs on your head unit?