Go to: 
http://forums.rennlist.com/
Go into the sub directory 
'Boxster and Boxster S (986)'
Go up in the right corner and by FORUM TOOLS, click 
SEARCH THIS FORUM...
Type in 
'Jwade'  in the box and it will take you to my complete installation and review.
I thought these were total bull**************** until I guinea pigged one for the company who sells them.  I was the first to ever install one on a 986 so they gave me a pretty good deal on the device, but I had to provide the installation picts and honest review of their product.  
Please take a look....and seriously, I thought it was pure snake oil until I installed it and drove it a day or so.  Pretty nice difference associated with throttle response and it takes a few days to get used to it.
This is NOT designed to add hp or increase 0-60 times....It's purpose is to increase signal on e-gas cars and when completed, allows a higher degree of throttle response.