I am very happy, I solved the problem, I remembered that I have a friend in Romania they have that type of BB 8120, but it is not the latest version but it does not matter and sent a messenger over Skype. Now I will go to the link:
Latest OS: 8120 4.5.0.312/4.5.0.187 (Multilanguage)
where everything is nicely explained how to install and wish me luck. If I succeed or not I will contact you. Once again many thanks to all for help