Well, the short answer is to type "pico ~/.bashrc" or "nano ~/.bashrc" to edit your configuration file for bash (the shell) and add the line:
Then if you open a new shell and type "echo $PATH" you should see that the new folder is in the list, meaning you can just type "ncftpget.bin" anywhere and it will run.
The longer answer is that there's probably a better way to do things. First, I hope this is a system administration kind of tool and that you're not running all the time as root, since that's very dangerous.
Second, the directory /root is root's home directory, just as /home/username is the home directory for normal users, so I'm not sure why there's a /root/home directory.
Third, you usually don't install programs in your home directory. It's pretty common to put them somewhere in /usr/local. I install from source, so I download files to /usr/local/src and extract/install them from there. That installs the files in the right places so they're already in my PATH and can be run just by typing the filename. If you look in the documentation for the program, it might give you some more information on the recommended way to install it.