lunatic_pony wrote:c-kwik I am gonna probably gonna get an older G35 because i am trying to spend about 20k or a little more... so therefor i am probably gonna get an older one.
OK. I'll describe the set-up I had in my G first. I used a product called Navbox. It was a guy who made these himself and sold them off his website. In any case, it was made to be used only with an Xbox which was perfect for me as I used a modded xbox along with the xbox media center to play games, movies and music. Not to mention it was loads cheaper. It basically intercepted the video signal from the nav unit and passed it through to the screen until you switched the signal, at which time, it would simply switch the video to the xbox's output. This device is no longer available as far as I know, but TVandNav2go.com and avelectronic.com both make devices that can interface with the nav unit and uses standard video connections. I am using an avelectonics unit in my Titan now.
For the sound, I used a Pac Audio interface which plugged into the satellite radio plug on the back of the head unit. The Satellite radio offers 2 separate channels (which allow for 2 sets of sat radio presets) to the head unit. The Pac Audio device access both, allowing you to bring two seperate audio sources to the head unit. Keep in mind that you can't use this with Sat Radio. In any case, the Pac-Audio interface also has 2 ground inputs. Each provides a ground signal that corresponds to one of the Sat channels (One for each). I actually split the audio from the xbox and plugged it into both the available inputs on the pac audio interface. Then I hooked one of the ground inputs for the pac audio device to the Navbox's switch lead, which switched when the lead was grounded. This allowed me to use the sat button on the dash to switch to the xbox by choosing sat channel one. Sat channel 2 would play the audio from the xbox, but not the video so I can use the nav screen while listening to the huge amount of mp3's I had stored on the xbox's 320GB hdd. In either case, it allowed me to switch video without having to use some sort of a toggle switch as it used the unused factory sat button. I believe both video interface devices I listed use grounded switch leads so you should be able to do the same thing with those.
The pac audio interface also allows you to use the steering controls and some of the head unti controls to output an IR signal. So essentially, I was able to control the xbox's functions without picking up a controller. Unfortunately, it had like a half second delay, from when you pressed a button to when it would respond, but it works fine once you get used to it.
Lastly, I had the guy who built the Navbox modify a device he built to bypass the nav system's start-up screen (He called it the No-Nag) to provide a signal that was hardwired to the inside of the xbox to turn it on shortly after I turned on the car.
In any case, the end result was that I had a kick *** media system with very factory like operation. I may do something like this with another xbox (I already built a read input for my DVD player and attached an xbox cable to them) in my titan. But the bigger project in this case is needing the time and motivation to build a custom case to fit neatly behind the titan's rear seats.
I outlined my install so you understand there are lots of different things you can do. The main things you need are to choose a video interface (I listed 2 I know are good above), a device you want to use to play the media (DVD player?) and choose an audio interface. For audio, if you don't plan to use the Satellite radio, then get the pac-audio unit. If you are going to use satellite radio, an RF modulator will work fine. If you take the time to search, photos of my install are in this forum somewhere. Or if you request, I'll put them up in this thread later when I have access to them.