Hi, you need to install GO Launcher free from the market first.
1.To Apply the Theme: After it's installed, Back to GO Launcher EX: MENU > theme preferences.
2.To Change icons:
Some devices may not change the icons automatically.
Tab and hold an app in desk screens: Replace > Choose the theme's icons.
Android Theme;GO launcher Theme;GO Launcher EX;Cool;Chinese;Art;Paint;