Thanks for downloading from Sim Terrific 
"http://www.geocities.com/simterrific" or www.simterrific.cjb.net

You have to have winzip when you downloading from Sim Terrific
extract them in this folder:

Skins: c:\Program\Maxis\The Sims\Gamedata\Skins
Objects: the same but \Objects insteed of skins
Walls: the same but \Walls insteed of skins
Floors: the same but \Floors insteed of skins
Houses: c:\Program\Maxis\The Sims\Userdara#\Houses

Thanks again.