Is fantastico free, if so is this how I install it?

Just SSH to your server and enter following commands (you may also copy/paste):

cd /usr/local/cpanel/whostmgr/docroot
rm -Rf fantastico*
wget -N http://netenberg.com/files/free/fantasticoinstaller.tgz
tar xzpf fantasticoinstaller.tgz
rm -f fantasticoinstaller.tgz

NOW GO TO YOUR WHM (replace xxx.xxx.xxx.xxx through the IP of your server, log in as root):
https://xxx.xxx.xxx.xxx:2087/fantast.../installer.php

Follow the on screen instructions.

If you get a Source Guardian error when you go to Fantastico for the first time, just run this command:

chmod -R 0755 /usr/local/cpanel/3rdparty/etc/ixed