>>> How To Install MadWifi On Debian 4.0 (Etch) <<<

First of all, make sure your /etc/apt/source.list doesn’t only contain 
“main” but “main contrib non-free”. And then, update your APT.


>> 1. Update

# apt-get update


>> 2. Install Build Environment

# apt-get install build-essential module-assistant wireless-tools
# module-assistant prepare


>> 3. Install the driver

# module-assistant auto-install madwifi-source


>> 4. Load it!

# modprobe ath_pci


>> 5. Scan!

# modprobe wlan_scan_sta
# wlanconfig ath0 list scan


That’s it! Have fun and happy surfing.