The installation instructions can be found here: http://www.splitsec.com/
Go to "Products" => "Boost Controllers" => Under the picture of the product is a link to a bunch of install/data pdf's. Good luck!
I've done this install a few times on my VW's. it's fairly simple to do. i will say when you need to snip the wire by the ECU. make sure you leave enough wire so you can put the wire back together when you want to take it off.