Also if the link is down due to site hits this is the info needed:
Installing from Disc instead of Steam Quote: 1. Close Steam (File > Exit). 2. Go to the Start button and select Run (XP) or type Run in the Search box and choose Run from the list (Vista). 3. In the Run window type:
"C:\Program Files\Steam\Steam.exe" -install E:
Replace E: with the CD/DVD drive you are installing from if is not correct. Replace C:\Program Files\Steam if your Steam installation is not in the default location.
4. Press OK. Your installation should continue from the disc.