Wiring diagrams are on the Messiah 2 website.....
www.Messiah2.com
As far as purchasing the chip.....
I would still rec. that you purchase the chip from Charlie_PS2 or Dust2Dust..... At least from them, you KNOW your getting the real thing.....
There are alot of sites selling "Messiah 2" when if fact, its NOT a Messiah 2 at all.....
Be safe.... BUY FROM THE BEST.......