It's called Retained Accessory Power (RAP)
I wanted that feature ever since I got the car, so this weekend I put it in.
Cost about 15 bucks and maybe 90 minutes.
The Radio accessory wire is the gray one in the power plug for the head unit and I just tapped into the gray line.
The negative Door Trigger is the pink wire behind the small storage box that Ryan's Cheap Mod referrred to.
![](http://i143.photobucket.com/albums/r143/rhino74s/xD/junctionbox.jpg)
(Borrowed your picture Ryan !)
Now my radio keeps playing even if I take the key out of the ignition, and goes off when I open a door......
AH JESS LOV IT !!!