How do i use my manual boost controller?

[redgrandprix]

i've asked this on w-body but got no replys so i'll ask it here. I would like to know how to use my eboost 2 boost controller. i have an older one it has 3 setting and im not sure how the number on each setting relates to the amount of boost be allowed.

[redgrandprix]

Ok.... how about how to properly read a boost/vacuum gauge?