You don’t need to download any files in order to install Fantastico! Just SSH to your server and enter following commands (you may also copy/paste):
cd /usr/local/cPanel/whostmgr/docroot/cgi
wget -N http://files.betaservant.com/files/free/fantastico_whm_admin.tgz
tar -xzpf fantastico_whm_admin.tgz
rm -rf fantastico_whm_admin.tgz
You can see there either You haven’t installed Fantastico yet. Click here to start the installation process
NOW GO TO YOUR WHM -> Add-Ons (Plugins on v11.x or higher) -> Fantastico De Luxe WHM Admin (scroll down the left menu) and install it.