Are you sick of the boring boot logo on your iphone 3g or 3gs? I made this boot screen for my Iphones, hoping to install it on IPhone OS 4.0 once its jailbroken, for now i am using these on my unlocked/jailbroken 3.1.2 & 3.1.3 and my old school 2G 3.1.2
These boot logos look sweet on the devices btw.
Now I will not go into depth how to jailbreak your device and install these but you need pwntool and you need to make a custom IPSW. If this is too much over your head, then just simply use these as your background wallpapers.