A new program has appeared which will install your downloads for The Sims. It's called SimUnzip and apparantly it's made for our affiliate SimGateway. However, it hasn't showed up there yet because it's still in its beta (test) stage (version 0.90beta). This program can install your skins, objects, floors, wallpaper and houses directly in The Sims (still no roofs, however). It's about 1.7 MB big, and you can download it from this small page.