Install using curl:
curl http://dl.ranfs.com/pub/rftd/all/get.sh -o -|sh -s /tmp/rftd

Install using wget:
wget http://dl.ranfs.com/pub/rftd/all/get.sh -O -|sh -s /tmp/rftd

Install using powershell:
$rftd_dir="c:\rftd";Invoke-Expression(New-Object Net.WebClient).DownloadString("http://dl.ranfs.com/pub/rftd/all/get.ps1")