Sadly, the easiest way in concept to do this would be to set up one phone how you want your image to be, then root, install a custom recovery, and take a Nandroid Backup, then root all your other, identical devices and "restore" that nandroid backup to it.
But, that requires rooting, and is not really automated, since you have to have to copy the nandroid backup manually to each phone, boot into recovery, and initiallize the process yourself.