@LostED you are a true magician of the subject. I am very happy about your availability and above all about your material (this last link was not available elsewhere in the forum). I know so much that we will still have a way to collaborate together, or rather you will be the one to help me. My only fault in computer science is one of the first security rules is backup. Boys who are beginners or experts always make a backup copy of what you consider important. Do not like me, because due to a software incident caused by a crumbling hardware I found myself with a totally zeroed archive. However make backups because it is as important as you care about your personal things. Again thanks @LostED