As a developer, I cannot recommend against using stuff like WindowBlinds enough. It's the cause of more weird UI bugs than I can count.He is either referring to A. Skin for outside PC Case or Laptop Shell or B. Windows interface/GUI/Wallpaper/Etc.
Adrian, there are multiple sites that offer custom laptop skins for purchase, just have to do a search.
If your referring to Windows interfaces, http://www.stardock.com/ has some awesome programs that I'm extremely happy with. Though I dont know if anyone has made a SR:TT specific theme.....