[HELP] Photobooth App

Hi,
First, sorry for my poor English.... I'm french !
I need help to develop a photobooth application, i'm noob and after many days looking for tutorials, i'm lost!!!!
I'm able to use camera, save a picture on a sd card, and take another photo if i want.... But i want more!!!!
i want to take 4 photos and have them in 1 picture from top to bottom, after that i want the possibility to send that picture by mail....
if someone can help me.... I know, i'm asking someone to develop that app instead of me!!!!!

Thanks