You want to do something called Big 3 - you can search this forum and find many threads, here is a genreic one
http://forums.carreview.com/showthread.php?t=678
I was going to do this sometime this summer if I had some time to kill. I was going to buy the cable, the connectors and a nice junction box to give several grounding points from here
http://www.partsexpress.com/
I think with how 'digital' the gen 5.5 is, there is a long term advantage to have a smother current on the electrical system. Not sure how true that really is, but for the cost it can't hurt. I don't really expect any more HP out of it like some claim, but a smoother idle would certainly be worth it