Choose a song that has an actual story that follows a chronological order. Make sure that the story is not too complicated or that the song does not move too quickly because it could be difficult to act out. When choosing a song, choose something that "speaks" to your mission. The song should correlate with the story you want to tell.
Listen to the song five or six times to get a feel for it. Imagine how you see the actors in your skit moving around the staging area.
Make a cast of characters for the skit so you know exactly how many people you need to act. Keep in mind the length of time you have and use stereotypes if necessary to get the message across quicker, such as a biker dressed in black for a sinner or a blond woman dressed in white for the good person.
Take one individual character and listen to the song again. Write down what that character will be doing during the song.
Repeat Step 4 for each character in the skit.
Combine your notes for all of the different characters in the skit. Give them each specific movements during specific parts of the song.
Write out a script of character movements in chronological order throughout the entire song. Print out one copy for each cast member. Allow room for exaggeration in the characters to help you get the point across to the audience. Exaggeration is particularly helpful when you audience is unfamiliar with the English language.
Create any necessary props. Make something that represents God in your Christian skit, such as a cross. Use something dark to represent hell or Satan.
Practice with your cast members. Let the cast hear the song once just to listen.
Go through the song again, this time telling them exactly what each character will be doing.
Play the song a third time and have the cast members follow the script notes while the song is playing.
Continue practicing until everyone feels comfortable with his or her part and until the Christian message is clear.