I would like to do a small amount of customizing to my newly jailbroken iPhone4. How do i remove the wide black bars on the top and bottom of both the lock screen & homescreen? One other thing. I would like to change the little arrow on the "slide to unlock" bar, and replace it with either one of my own Star Wars pictures(i have plenty) or get it through Cydia. I've been researching this, but everything i'm looking for comes in packages with other stuff that i don't need. P.S. Can somebody please tell me what a "plug-in" is. Thanks.