Applescript/Commandline to Join Hidden Network

I just got a new AirPort Extreme and I set it up as a closed/hidden network for privacy in sharing disks and printers. I would like to be able to join the network it creates more easily than having to enter in the SSID and password each time (also, I guess the OS doesn't 'cache'/remember hidden networks like it does for a normal, open one) so I googled how to change AirPort settings on a MacBook via Applescript or the command-line without much luck; everything seemed outdated or didn't work with my MPB. What is the best way to join a network easily and is it possible to write a script that you would simply have to click to change networks?

Thanks!

 

Works like a charm....

Perfect! Thanks so much!