Unfortunately, there is no great way to have good family photos in the game. Moschino pack did come with some extra options - there is a portable camera tripod which can be used to 'take photo of' or 'take photo with' and they have a choice of poses but the maximum grouping is three sims. There was also the photo studio in the GTW pack for photos of two sims. The only other option is the family portrait item which came with the pre-order of Life & Death. This produces a portrait of all sims in the household (the same sort of pic you get in the game sim library) and can be locked, so you could add sims into the house for the picture, lock it so they stay in the portrait and then move them back out if you wanted to. If you don't have the portrait it is available to buy on CD Keys website and is called the Life & Death Macabre Mementos Digital Content.