Well, those are implemented by the use of mods. Mods are changes to the game image files. You can download them from the Virtual Families mod section, here:
http://www.ldwforums.com/ubbthreads/ubbthreads.php/forums/61/1/Virtual_Families_ModsYou put them in your game by, if you have a Windows PC, going to C:/Program Files/Virtual Families/images, I think...
If you have a Mac, you control-click or right click on Virtual Families.app, select "Show Package Contents," and then move the mods to the Resources/images folder.
It is advised to make a backup of the original images, in case you make a change you don't want.
I hope this helps! Happy mod-hunting!
PS: If you wish to request a mod, go here:
http://www.ldwforums.com/ubbthreads/ubbthreads.php/forums/65/1/Virtual_Families_Mod_Comments_