Is it possible to change the color of the theme in the iphone? I got an iphone 2G running 3.1.2... I want the my iphone to look like the pics in link below. the 3GS has an accessibility feature which inverts the colors of the apps. But, I got a 2G. Can I add the accessibility option in my 2G phone?

How To Change The Color Scheme Of Your iPhone 3GS - iSmashPhone iPhone Blog