CJ,
I was in Harvey Normans in the north side a couple of weeks ago and i seen a new slim line PS2, i think it was retailing at about €160. Would be designed to fit into the car!
PS2 adaptor for car costs around €100-€120 conect it to a AV Monitor and bingo - You have your PS2 and a DVD system in your motor for under €300 asuming you already have a Monitor in your car?!
If not then a flip out AV monitor will probably set you back anything from £300.00 depending on what you want!!!
Just thought i'd shout that 2 you. Its great for long journeys or if like me, you have the woman and kiddlie with you everywhere you go