I have a notebook where installed the Debian Lenny (unstable release).
I have a wi-fi network in my house and I can not navigate.

This means that you have some doubts

* How do I know if my wireless card is installed?
* If the driver installed how to surf the web?
* If the driver are not installed how to install and configure the
Internet?
* I found this driver (
www.broadcom.com/support/802.11/linux_sta.php) and I do not know how
to install

My wireless card is: Broadcom Corporation BCM4312 802.11a/b/g (rev 01)
(lspci result)

Another problem is that I find with my video card, where the same way I do
the following questions

* How do I saberse the card is installed?
* If the video card installed, how to enable the 3D graphics
capabilities in Debian
* If the video card are not installed as I install it? I tried using
ATI's own driver, but without success. = (

My video card is: ATI Technologies Inc RS690M [Radeon X1200 Series] (lspci
result)

I'm a dummie in linux e need help.