This might not work with what you have...
But our tv/vcr combo fits on the console between the front seats in our truck. We ratchet strap it to the seat brackets...
The playstation we set under the rear seat...in the middle,sort of on the "hump" on the floor....we ratchet that to the brackets of the rear seats....
I found this to be a real PIA, and now don't bring it. DD's bring their game boys, and thats more than enough with the DVD's, VCR's or whatnot depending on what we bring.
Brandy