You need this the pose player and a set of poses you prefer...i enjoy IMHO poses or R2M poses
There are others i like as well but these are good places to start...
You will need these camera mods to be able to take good close up pictures of your sims as well....
Then just lots of patience....
The pose player is an object that you buy under misc decor...
Use the cheat codes "moveobjects on" "testingcheatenabled true" "hideheadlineeffects on" This way you can move your sims...click on the mailbox to set their needs to static and make everyone happy and hide the thoughts that appear above their heads.
You may want a photo editing program to edit your pictures in....These two are excellent free ones...
And you should be set....good luck and we can't wait to see what you come up with...
Camera Controls keys as well....
Move Left/Right :: [←] / [→] and [A] / [D]
Move Forward/Backward :: [↑] / [↓] and [W] / [S]
Move Faster :: [Shift] + [←] / [→] / [↑] / [↓] or [Shift] + [A] / [D] / [W] / [S]
Zoom In/Out :: [Z] / [X] or [+] / [-]
Rotate Left / Right :: [,] / [.]
Save Camera Position 1-5 :: [Control] +  through 
Restore Camera Position 1-5 ::  through 
Snap to Camera Position 1-5 :: [Shift] +  through 
Enable Movie Making Mode :: [TAB]
Toggle Map Mode :: [M]
Movie Making Mode
Lower/Raise Camera Height :: [Q] / [E]
Roll Camera Counterclockwise/Clockwise :: [Shift] + [A] / [Shift] + [D]
Level Out The Camera Roll :: [Shift] + [S]
Adjust Focal Length :: [Z] / [X]
Start/End Video Capture :: [V]
Take A Snapshot :: [C]