Sorry for my english
well I think the problem was the driver(myself), not very litterate in ISO process. I did probably burn it before but too fast and it give me a file .nrg alone. Like I said before my Nero there is no file menu so I was confused there but finally saw at the bottom disc image and tried that first too fast and than as you suggest slowly but sure. I just open my Nero again and right at the beginning screen running it says again Nero 5.5 and in the program there is a popup somewhere inviting us to go to faster Nero 5.5 so I assume that I was not having it. Now I dont know what I have very confusing. When I said 5 it was after I had seen that popup.
For my last question I will try to be more clear. I boot with Knoppix, browse in there many place and saw that we can connect to the internet somewhere but could not configure it for some reason . I wanted to try the possibilities of Linux and see how everything work but again so new to all of this probably don't understand how to do it. May be there is something I am not aware of. Just would like to try it more. I hope it is better this time