I will update the theme frequently by adding more and more widgets to it.
To change the weather location, go to User/ Library/ GroovyLock/ xxxwidget and open up LockBackground.html via a text viewer. Tap edit and search for something like this "USNY" and you should see some numbers too, but don't worry, just change that code with your own weather code provided by the weather channel. This widgets do not use yahoo weather.
There is no need for changing the wallpaper manually, it automatically changes when you choose one you want.
Please don't pirate this package, if you can't afford it just tweet me: @donitechh and maybe I'll give you a free copy. :)