97 mercury villager audio head unit wiring question
 

im trying to help out a friend and set her up with a new head unit for her villager, sadly, at the moment it isnt going very well, i havent been able to find an accurate schematic for this model. i have a picture of the wiring. what i need to know is what each wire goes to so i know which to snip and splice to the new head unit's wiring harness.
thanks! this got me really confused right at first and i need to get her set up. thanks again in advance to anyone who takes the time to read this/ help me out! i could have put this up on yahoo answers but being a forum guy myself i know just how helpful you forum guys (and gals) can be in a bind!
http://i100.photobucket.com/albums/m...40-45_66-1.jpg