Here is a program I created some time ago. You will need to have zenity and feh installed in order to use it. The program also assumes that you start your system with startx or a dm like Slim, which uses .xinitrc file to startup desktop and programs alike.
Below you will see a list of screenshots, which will clarify how to use the program.
Copy the program to /usr/share and run it within a terminal using the command above. You can change the location path but then you also need to tweak some lines within the program (this is easily achieved).