How to write bisbligando rule for VSL in N4?

Hi guys, I am trying to work with the reality that our software gives us... Anyone who can teach me step by step to write bisbligando rule for VSL harp?
I must say I never wrote any rule and I am not a skilled computer guy, so please short and detailed steps ok? I am using mac OS X 10.8.2.
Thank you,
Rubens.
I must say I never wrote any rule and I am not a skilled computer guy, so please short and detailed steps ok? I am using mac OS X 10.8.2.
Thank you,
Rubens.