I realize I should have taken pictures when doing this mod. I will snap some pics next time I rip apart the dash.
Hopefully the diagram is self explanatory. If anyone needs anytype of clarification feel free to PM or post.
The door unlock wire is the black red/green stripe wire found here in this post:
http://www.legacygt.com/forums/showthread.php?t=2972&highlight=doors+unlock
In step 8, it mentions to tape of the short section. Instead of taping it up you will use this wire to pulse the relay.
The relay itself has a dial which lets you change the duration of staying closed from 0-60 seconds.
I just used the full 60 seconds and using the jumper settings on the M2-ATX power supply, the computer stays on for another 30 seconds if I run out of time from the 60 second relay.
Usually, when going to my car I will just hit my doors unlocked twice about 50 ft away and by the time I get in the car and crank the ignition I get music playing.
One thing I forgot to include in the picture is the relay has a wire that you need to cut so that it activates on positive 12v+. If you leave it uncut it will look for a negative pulse. untitled.pdf