PreWork:

apt-get update  
apt-get install build-essential  
apt-get install libssl-dev

Install Madwifi for AR5007EG / AR5001

# Download latest from http://snapshots.madwifi-project.org/madwifi-hal-0.10.5.6/  
tar -xvzf madwifi-hal-0.10.5.6-r4126-20100324.tar.gz  
cd madwifi-hal-0.10.5.6-r4126-20100324  
make  
make install  
# System, Hardware Driver, mark "Activate Alternate Drivers"  
reboot

Install latest Aircrack-ng

# Download latest from http://www.aircrack-ng.org/  
# i.e. wget http://download.aircrack-ng.org/aircrack-ng-1.1.tar.gz  
tar -xvzf aircrack-ng-1.1.tar.gz  
cd aircrack-ng-1.1  
make  
make install

Lets go! ^^