I think I have one of those in my car as well and finding info wasn't very straightforward. They were sold by moreboost.com which is gone now. I found the install and settings info using the "wayback machine" at http://web.archive.org to view a cached version of the old moreboost site.
Orient your computer so that the computers connector pins are on the left side and the map sensor is in the top left of the board. On the map sensor, you will see two sets of jumper pins. The first set on the left front of the map has 4 pins, the second set to the right of that has 5 sets of pins. In the set which contains 5 pins the first pin on the left is pin number one, bosch mode. If you want to set three bar for example, you would set pin number 1, pin number 3, and pin number 5. Pin number 5 is the one all the way to the right.