I just built android AOSP from source from googles repo. I didn't use the OTA pakage command because it kept telling me that it wasn't installed or whatever. So I built it and now I have the .IMG files in my out folder. My question is, is there any way that I can turn those .IMG files into a zip? And if I were to start cherry picking from git or gerrit, will it have to rebuild the entire ROM or will it just recreate the parts of the ROM that I cherry picked?