I just downloaded the Windows 8 Enterprise Evaluation today. My test machine was a Dell Latitude D630. After installation, all the drivers were installed. The only problem was the touchpad driver. It used a generic mouse driver, and scrolling was not supported. There is currently no Alps touchpad driver for Windows 8. I tried the driver for Windows 7, and it worked perfectly. Here is the driver I used.
After the driver is installed, go to the control panel to change mouse settings. You can change the touchpad settings there.