Intel Wireless Board WiFi Link 4965agn

Hello everybody, I'm new to this forum, Mageia 2 distribution, and also Linux in general. I'm trying to catch up, and I need some basic help about the wireless board configuration. The problem, as you may have read many times, is the Intel WiFi Link 4965agn, and its non-free drivers. After installing Mageia 2 from a USB ISO DVD, the wireless network doesn't work.
Let me say that I know that it's basically easy to solve this problem with an Ethernet connection to the web, but unfortunately to me it's not so easy to get one. So my question is if there's a way to solve that offline (I mean offline in Linux, I can access the internet from Windows).
What I did before opening this help thread is to install the drivers provided here http://wireless.kernel.org/en/users/Drivers/iwlegacy, and I actually think that this made something works, in a way. Indeed I can see the available networks with the Network Manager in Mageia, but when I connect to one, it's prompted a message which advises me to add a medium in the software manager, and I cannot access the internet.
My system is an Acer Aspire 5920G laptop, if it can be useful.
Hope you can give my some suggestions. Thank you.
Let me say that I know that it's basically easy to solve this problem with an Ethernet connection to the web, but unfortunately to me it's not so easy to get one. So my question is if there's a way to solve that offline (I mean offline in Linux, I can access the internet from Windows).
What I did before opening this help thread is to install the drivers provided here http://wireless.kernel.org/en/users/Drivers/iwlegacy, and I actually think that this made something works, in a way. Indeed I can see the available networks with the Network Manager in Mageia, but when I connect to one, it's prompted a message which advises me to add a medium in the software manager, and I cannot access the internet.
My system is an Acer Aspire 5920G laptop, if it can be useful.
Hope you can give my some suggestions. Thank you.