Let me suggest to visit the official OB forums ... at the beginning, that place was very helpful for me, too ... some "official" info about your request:
... a youtube video on that:
*** Hidden text: cannot be quoted. ***
... great overview by Ruri "it"self:
*** Hidden text: cannot be quoted. ***
... and another example for bypassing:
*** Hidden text: cannot be quoted. ***
btw, I am sorry, but I am too lazy on mondays to explain it in details. nevertheless i'm pretty sure you will figure it out without any problems