Thanks for the attention, I solved my problem talking with the IT guys for administrator permissions(hard times, but solved).
A custom server would do a great job for solving this also, but what is actually the problem behind making an offline installer? As a comparison, Google Chrome has an offline installer.
My problem was solved, but I think lots of people are asking themselves this same question I am doing.
And thanks again for the hard work (what I am certain you guys do)
A. Tempel