Here is how you can download and install Macbook Pro Drivers on Windows 8 Consumer Preview or Windows 7:

• Download Bootcamp 4.0 Drivers, here’s a link on some Apple CDN for the .pkg file containing the drivers:
  http://swcdn.apple.com/content/downloads/54/00/041-0694/sq2RLp7XVNQzRG8qdpsq9sj4 pHsgXkgPYg/BootCampESD.pkg
• Open this file with 7Zip in Windows:
  http://www.7-zip.org/download.html
• Open “BootCampESD.pkg” in 7Zip then navigate and extract:
  “BootCampESD.pkg\Payload\Payload~\.\Library\Application Support\BootCamp\WindowsSupport.dmg\0.Apple_ISO“
• Rename the file from 0.Apple_ISO to BootCamp4.iso
• Extract the iso (“BootCamp4.iso”) with 7Zip to a folder.
• From the Windows start menu, search for “cmd”, and right-click to run as administrator.
  Navigate to the extracted folder, for example:
  C:
  cd “WindowsSupport\Drivers\Apple”
• From the prompt in that folder, run “msiexec /i BootCamp64.msi”