Since there was no such program listed in this distro and I found it to be awsome in BT5, well I needed to found a way to import it so to speak..
Do this
First you need to download the backtrack key
sudo wget http://all.repository.backtrack-linux.org/backtrack.gpg
Then you need to add this key
sudo apt-key add backtrack.gpg
Ok, then you need to add the backtrack repository to sources.list
Use your favorite editor, for this example I'll give nano some love
sudo nano /etc/apt/sources.list
At the bottom of the list, add this following lines to your file
#backtrack
deb http://all.repository.backtrack-linux.org revolution main microverse non-free testing
ok, your done, to save and close the file in nano do CTRL+O then CTRL+X
Next we need to update
sudo apt-get update
ok, now to install gerix
sudo apt-get install gerix-wifi-cracker-ng
You will find it under the meny other (ps. the gerix.py needs root access)
Happy hunting