I am doing the same thing, just ordered a 15" flip down. I am going to put the 360 in the arm rest, cut up the plastic body of the 360, it is full of empty spaces. I will add a few extra fans and add some vents to the sides of the arm rest below the seat level so it is not visable. Also look up how to eliminate the "X" clamps to make it more "Road worthy." There are some kits that are a 12v to 12v so you do not need a converter on the power cord, but I will do the converter for the simplicity. The xbox pulls a constant 170watts so go at least 500 watts (Builders lie on the output of the converters so over kill in needed). remember, keep it in a constant state of air flow or it will cook. now go play.