Here is the contact info to HeavyThrottle who can rewire the wiring harness:http://www.Heavythrottle.com
To remove the stock harness is quite simple. Simply find a large rubber gromet on the passenger side firewall and follow it until it starts to branch off. From there you should see multiple plugs and just unplug them. Make sure you take picutres to remind yourself where they go. Next go into the cabin, unbolt your ECU and unplug the harness. Loosen the intake box by unbolting it and pulling it out towards you, this giving you a little space between the inside firewall and intake box. Find the large plug under the dash behind the intake box and unplug that as well. Also there are some little pugs you'll have to unplug under the dash. After that, go back outside and pull the rubber gromet out from the engine bay and you should be able to pull the wiring harness out with it. Do it slowly and carefully as you can easily break or tear some wires. It's easier if you have someone pulling on the harness while somebody elses is on the inside feeding it through. You'll have to unbolt some stuff to get the harness completely out of the engine bay. Hope that helps
