I see... thanks man.
I didn't realise that, because right now my oacs is full packed with a lot of packages such as edit-this-page, dotlrn, communities, and i have at least 4 places that i almost do the same, they are: create departments, create communities, create aplications, create subjects, create terms.
So, i'm lost on the huge structure that is there.
But anyway, i've just installed an empty oacs box on my own laptop and i'm understanding step by step what is and what does each package, service, and aplication.