step 1Install Summerboard
To do this you will first need a jailbroken iphone or iPod Touch. If you do not have one check out my instructable on how to do so here --http://www.instructables.com/id/How-to-jailbreak-your-1.1.4-or-lower-iPhone-or-iPo/.First you need to install summerboard, an application that allows you insta…

step 2Restart Your iPhone or iPod Touch
You must restart your device to activate summerboard. It will not work unless you do this.

 

 

step 3Install A Theme
An icon called "SMB Prefs" will now appear, do not use it yet. Next you need to install a theme. To do this, go to the install tab, then to "themes (summerboard)".

 

step 4Change The Theme
Go back to the homescreen and open "SMB Prefs". Next, go to the theme tab and select the theme you want to use.
 

 

step 5Respring
Go back to the homescreen and wait for your device to respring... Your new theme is installed with custom backrounds and icons!