You can use Squinge's Hula Dance and More mod for a standing portrait...
http://www.insimenator.org/showthread.php?t=9544There's also a thread that has some info on it...
Family group photo's
http://www.insimenator.org/showthread.php?t=31081I think there's a boolprop command that you can use to position them so you don't have to waste time trying to get them to stand where you want them to stand... To get all of them on one lot just invite the three others over...