It's called "Hyper Grounding" and you can buy a kit or just make it up yourself with a decent set of wires and wire ends. You can find the kits on eBay for around $10 plus shipping.
Essentially, you start with the negative terminal of the battery and from there run grounding wires to different parts in the engine bay. I ran three wires to: (1)Good grounding screw on the body; (2) one of the bolts that hold the computer to the firewall; (3) a grounded bolt on the engine. I covered the grounding wires with chrome wire loom to they would match the other wires in the engine bay. The grounding wires are the ones marked with a yellow star in the picture below.
