Wireless and Xchat Issue

[Wasp]

Hey guys,

I have a couple of questions regarding getting various applications and processes to work with my installation of Debian. I installed Lenny with a wired connection and am now trying to get wireless working. I now have a Sony Vaio VGN-FZ190 laptop with an Intel (R) Wireless WiFi Link 4965AGN adapter and a Marvell Yukon 88E8036 PCI-E Fast Ethernet Controller. I have done some research and it does appear that the Intel adapter is supported (linux kernel 2.6.23 or later - why I installed Lenny). Everywhere I look it appears that I am supposed to be running the following command:

aptitude install firmware-iwlwifi

However, I get the following:

debian:/home/olivier# apt-get install firmware-iwlwifi
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Couldn't find package firmware-iwlwifi
debian:/home/olivier#

According to iwlwifi - Debian Wiki, I will need to add "non-free repository to /etc/apt/sources.list " I am not entirely certain how to accomplish this and google has not been of much help. I tried adding the following after finding it on a guide, but the same error occurs.
Google

  
     # See sources.list(5) for more information, especially
     # Remember that you can only use http, ftp or file URIs
     # CDROMs are managed through the apt-cdrom tool.
     deb http://http.us.debian.org/debian stable main contrib non-free
     deb http://non-us.debian.org/debian-non-US stable/non-US main contrib non-free
     deb http://security.debian.org stable/updates main contrib non-free
     
     # Uncomment if you want the apt-get source function to work
     #deb-src http://http.us.debian.org/debian stable main contrib non-free
     #deb-src http://non-us.debian.org/debian-non-US stable/non-US main contrib non-free

Can anyone shed any light on this?

Next, I installed xchat but am unable to log on to the Debian server. This is the endless cycle that occurs:

 Python interface loaded
 Perl interface loaded
 Tcl plugin for XChat - Version 1.63 
 Copyright 2002-2005 Daniel P. Stasinski
 http://www.scriptkitties.com/tclplugin/
 Tcl interface loaded
* Looking up irc.debian.org
* Connecting to irc.geo.oftc.net (66.184.117.12) port 6667...
* Connection failed. Error: No route to host
 Cycling to next server in Debian Servers...
* Disconnected ().
* Looking up irc.debian.org
* Connecting to irc.geo.oftc.net (66.184.117.12) port 6667...
* Connection failed. Error: No route to host
 Cycling to next server in Debian Servers...
* Disconnected ().
* Looking up irc.debian.org
* Connecting to irc.geo.oftc.net (66.184.117.12) port 6667...
* Connection failed. Error: No route to host

Thanks in advance.

Wasp

Edit: Here is what my /etc/apt/sources.list currently looks like after a fresh install.

# 
# deb cdrom:[Debian GNU/Linux testing _Lenny_ - Official RC i386 CD Binary-1 20081104-07:57]/ lenny main

deb cdrom:[Debian GNU/Linux testing _Lenny_ - Official RC i386 CD Binary-1 20081104-07:57]/ lenny main

deb http://ftp.us.debian.org/debian/ lenny main
deb-src http://ftp.us.debian.org/debian/ lenny main

deb http://security.debian.org/ lenny/updates main
deb-src http://security.debian.org/ lenny/updates main

[Wasp]

I changed the sources.list and added the following:

deb http://ftp.us.debian.org/debian/ lenny main contrib non-free
deb-src http://ftp.us.debian.org/debian/ lenny main contrib non-free

deb http://security.debian.org/ lenny/updates main contrib non-free
deb-src http://security.debian.org/ lenny/updates main contrib non-free

I was then able to run

 
apt-get install firmware-iwlwifi

which installed it succesfully

followed by

modprobe iwl4965

Nothing happened it just goes to a new command line. The network manager now picks several wireless networks and shows the strength of the connection. I type in the passphrase for my connection and it still won't connect. Any ideas about this and the previous xchat issue? Thanks a lot.

Wasp