If you are semi-skilled mechanically, you can do it by following the video CD. You also really must jack at least the front end with jack stands under it. That's how I did mine a little over a year ago and I love the thing. It's something you can enjoy each time you drive the car, whether or not you get on the gas.
I set mine at 7 turns out and haven't wanted to change it.
2013 GT Premium, Red Candy Metallic, Brembos, Auto, GT500 Axlebacks.
SOLD! 2008 GT Premium, Vapor Metallic, 5-speed stick w/MGW, Ford Racing M6066 Whipple S/C, 3.31 gear, GTA's. GT500 front end, spoiler, suspension and wheels. Sequentials and one touch. - can't wipe the smile off my face.