I would say the install will be nearly impossible, as none of the wiring is there for the Infinity unit. I have looked into doing his myself, but I'm afraid it is next to impossible. The only way I think it could be possible is if you found an Infinity-equipped Sedona at a salvage yard and stripped the wiring from it.
Well I found a write up on the forum and all I need to do is wire in a small amp.
I know where there is a wrecked Sedona, it's where I got the stereo from.
Not sure if I want to drive the hour one way to strip the wiring or just go to the local stereo shop and have them wire in a amp.