Changing default settings on android 4.2.2.

1) I has a large party of phones and need to change some launcher setting for them. (number of desktops, icons in bottom bar etc.) All this actions I can performe by hands, but it will take too much time. Do you know any other way to move settings from one phone to the same another? Maybe exist some file, which include all launcher settings
2) How can I make this new changes as default settings?