Hi Beck...if its the final image that matters, do the stuff you need to do, that is rendering man/woman on chair, some folding arms, some clapping, some laughing etc.. As for the model on the catwalk, render them individually too. After all that you want is set, take all the bmp file and compose them in a Paint program using layers. Just know that the scene you use for the setup must be a "constant", in this case don't move your camera and the catwalk stand. Good luck.