DO NOT go triggerhappy with image deletion in Springboard.app for the sake of making your device faster, even if it isn't used for your device. I screwed over my 3GS this way-- I deleted every image that was designed for the iPad (ones with T in it, or 72, or variations of images with Portrait and Landscape). Springboard.app crashed, and wouldn't start up. A hard reset didn't cut it, and I tried that after an unsuccessful respring. It tried repeatedly to start SpringBoard and failed constantly. Luckily I remembered that while it's 1 AM Central Time, it's only 11 PM Pacific Time. That meant Apple hasn't stopped 0.1 signing (at around midnight), and I can still restore using a saved restore file and still be jailbroken. I was almost in tears. ;-; All this means: Alter images for YOUR device, and do it CAREFULLY. I know it sounds obvious, but it's true. The iPad images aren't even loaded into non-iPad springboards, so DO NOT TOUCH. I probably won't be able to answer questions due to sleep and restorative work, but I'll see what I can do in the morning. ...well, later this morning.