Step 1: Where to Go
When you enter emulationstation press f4 on your keyboard and this will take you to the directory. When there Type in "cd RetroPie-Setup"
after you type cd RetroPie-Setup
type: "sudo ./retropie_setup.sh"
Step 2: Step 2
When at the selection screen go to select and then go to select splash screen
Step 3: Picking Your Flavor
You can look at different ones but make sure that once you have selected one. Go to the reboot option and reboot