Need Help Putting a PS3 in Prius (Pri-S-3)

Hey everyone,
let me first say that I understand that I cannot play and drive at the same time, let me also say that my friend works for sony and he gave me a ps3 and a wii, so with the spare ps3 I was going to attempt a fun project.... Now that that is out of the way. I am going to be buying the ultimate lockpick 3 to unlock my center console screen, run an A/V component cables from the glovebox (where the lockpick a/v cables will connect with the radio shack component cables) down the right side of my prius all the way to the back, and in the trunk space near the spare tire I was going to put a PS3. I needed some help on how to power this. I originally thought about powering directly from the battery by connecting a fuse and then attatching the converter (yay or nay?). If it is not too detrimental to my car, I want to be able to play it when the car is off. I was going to go with a capacitor connected to my battery, and add a converter in the loop that I would then plug the console into. I want the capacictor so I can get some playing time when my car is off. As I understand, the larger the voltage on the capacitor, the more watts per hour it will produce thus giving me more playing time that is not pulling from the actual prius battery while the car is off and unable to regenerate battery. (if any of this is wrong or ill-stated, please correct me). I have a few questions for some of the fellow prius homeys.

1. Is this the most efficient way to power my PS3?
2. Will I need a fuse in this battery --capacitor --converter circuit?
3. Anything I may not have thought of, or any suggestions?

I have been reading prius chat forums for a while and this is my first post. I hear of people really getting good advice, so I hope you guys can help me out! I will be happy to post pictures once/should the job get done.

 

<div class='quotetop'>QUOTE(Danny Hamilton @ Nov 15 2007, 11:40 AM) [snapback]539956[/snapback]</div>

Thanks, I did not think about that MFD being shut down as a result of me shutting the car on.... I guess I can leave the car on and simply connect the converter to my car batter under the seat.....



<div class='quotetop'>QUOTE(usbseawolf2000 @ Nov 15 2007, 11:14 AM) [snapback]539949[/snapback]</div>

Thank you, I did not think to get a ps3 with smaller storage.
-Cam