I bought a Craig CLP281x netbook at Rite-Aid (ICS) specifically to begin playing around with Android and learning how to modify it. I got an update.img from the craig website, and rooted the device.
My question here is more basic than basic - I can open the img and look around inside with just an explorer, but if I want to try "rolling my own", do I need to use Android SDK to somehow create it? Or do I just start reading up on component parts and swapping them out?
Essentially, what do I need to compile my own update.img?