There is a new iPhone theme simulator for windows. Ofcourse there are a lot of theme creators these days, but this new one must be one of the easiest iPhone Theme creator for windows. It literally just takes minutes to create your own unique custom theme.
In the video below you can see how fast and easy it is to create your theme. To use your theme you need a jailbroken iphone.
You can change the springboard, but you can also edit the locksreen , statusbar, wifi, battery and more.
You can download this theme creator for free. [download]